Question 1
1.
Answer the
following
a.
What is a gene?
b.
Define genetics
c.
Write a short on
DNA
Question 2
a.
Nucleotide
consists of three components, name them.
b.
Nitrogenous base
are four components, name them
Question 3
Using
a separate coding table for each, show how the following amino acid are coded
a.
Valine and
Proline
b.
Leucine and
Arginine
Question 4
Assuming
the first base code of a sequence are UCAG, the second base code are GACU and
the third base code are UCAG respectively. Using sequence coding table, code
for different proteins (amino acids) and name them.
Question 5
a. Give at least three examples of the
role of genetics in society today
b. Briefly explain why genetics is crucial
to modern biology.
Question 6
What role did genetics play in the development
of the first domesticated plants and animals?
Question 7
Outline
the relations between genes, DNA, and chromosomes
Question 8
Explain
the importance of chromosomes and genes in heredity.
Question 9
Distinguish
between the following pairs of terms:
a)
Chromatids and chromosomes b) Prokaryotic and eukaryotic chromosomes.
Question 10
With the aid of a suitable diagram, show the
structure of a typical eukaryotic chromosome.
Question 11
Explain the four major types of eukaryotic chromosomes
based on centromere position.
Question 12
a. Give reasons why Mendel chose the pea
plant for his experiments.
b. Explain each of the following genetic
terms:
i)Monohybrid,
ii)Dihybrid,
iii)Genotype,
iv)Phenotype,
v)Alleles,
vi)Recessive
gene,
vii)Dominant
gene
Question 13
a. Discuss the bases for Mendel conclusion?
b. If Ebuka is Homozygous Tall and Sandra is Short, using
a test cross show the expected offspring of their children to F4 if they got
married.
Question 14
If Taiwo got married to Emelda who is heterozygous tall, what
will be the phenotype of their children at F2 assuming Taiwo is Tall?
Question 15
State
and explain the two Mendelian laws of inheritance.
Question 16
Explain
the behaviour of chromosomes during meiosis in relation to Mendelian laws of
inheritance.
Question 17
Differentiate
between monohybrid cross and dihybrid cross with an example of each.
Question 18
State
the genotypic and phenotypic ratios of offspring produced at F2, in a
monohybrid cross where there is complete dominance.
Question 19
In
rabbit, brown hair is dominant over white hair. When a pure-breeding brown hair
rabbit is crossed with a pure-breeding white hair rabbit, all the F1 offspring
produced had brown hair
i)
Indicate the genotypes of the parents,
ii)
Indicate with the aid of labeled diagrams how the F1 and F2 offspring are
produced.
Question 20
Illustrate
with the aid of a Punnet square the F2 offspring produced in a dihybrid cross
between Tall and Smooth podded plants X Short and Wrinkled podded plants. Tall
is dominant over Short and Smooth pod over wrinkled pod.
Question 21
Explain the deviations from Mendelian ratio.
Question 22
a.
What is the
concept of dominance?
b.
How does complete
dominance differ from incomplete dominance?
Question 23
a. State the four blood phenotypes of man
and their possible genotypes.
b. Explain each of the following with
suitable examples:
i)
Linkage
ii)
Multiple alleles
iii)
Co dominance
iv)
Lethal genes
Question 24
a. Explain the genetic basis of ABO blood
group
b. Which of the blood groups are referred
to as Universal donor and Universal recipient and why?
Question 25
A
man heterozygous and in blood group A is married to an heterozygous woman in
blood group B. What are the possible blood groups of their offspring?
Question 26
State
the blood phenotype of the following genotypes:(i) IAi, (ii) IAIB, (iii) ii
Question 27
a. What is the most defining difference
between males and females?
b. How do monoecious organisms differ from
dioecious organisms?
Question 28
a. Describe the XX-XO system of sex
determination. In this system, which is the heterogametic sex and which is the
homogametic sex?
b. How is sex determined in insects with
haplodiploid sex determination?
Question 29
a. What is meant by genic sex
determination?
b. How does sex determination in Drosophila
differ from sex determination in humans?
Question 30
a. What characteristics are exhibited by
an X-linked trait?
b. Explain how Bridges’s study of
nondisjunction in Drosophila helped prove the chromosome theory of
inheritance.
Question 31
a. What is mutation?
b. Distinguish between the various types
of mutation.
Question 32
a. When is mutation considered to be
beneficial?
b. Differentiate, with examples, between
physical and chemical mutagens.
Question 33
a. What are the role of mutation in
evolution and variation?
b. What is the difference between types of
mutation and classification of the causes?
Question 34
a. What are genetic variations? State two
causes of variation in nature
b. Distinguish with examples between
heritable and non heritable character
Question 35
a. Explain each of the following terms,
giving four examples of each:
i)
Continuous variation
ii)
Discontinuous variation
b. Classify the following list of variations
into Continuous and Discontinuous Variations,
using the format below: eye colour, tongue rolling, ability to taste PTC,
height, blood groups, intelligence, mass/ weight, haemophilia Continuous variation, Discontinuous variation Size Sex of a child.
Question 36
a. Explain the role of meiosis in causing
variation
b. List the three main forms of syndromes
found in human chromosomes.
Question 37
How
many chromosomes would you expect to find in the karyotypes of persons with
Down syndrome, Turner syndrome and Klinefelter syndrome? What are their sex
chromosome genotypes? 8) Describe the physical characteristics of persons with
Down syndrome and Turner syndrome.
Question 38
a. Define Biotechnology.
b. What are the branches of biotechnology
and enumerate them
Question 39
Write
a short note on various biotechnological applications.
Question 40
a. Name the two types of Nucleic acids.
b. State the main components of DNA.
c. Name the four nitrogenous bases found
in DNA and show their specific pairing.
Question 41
a. What is meant by sense and antisense
sequence of DNA?
b. List the applications of Biotechnology
in development.
Question 42
a. Name an abiotic stress that can be
tolerated by the genetic modified crop.
b. Give an example of crop in which
nutritional value is enhanced?
Question 43
a. What is the product of Bt toxin genes?
b. Name two Bt toxin genes which code for
cry protein?
Question 44
a. Name Bt toxin gene which control boll
worm and Bt toxin gene which control corn borer?
b. What is the alternative to enhance crop
yield and minimize the use of fertilizers and chemicals for reducing harmful
effects?
Question 45
a.
What is gene
therapy?
b.
What is unique about transgenic animals?
Question 46
a. Define Green Revolution.
b. What is the significance of traditional
knowledge?
Question 47
a. What are Cry proteins? Name an
organism that produces it. How has man exploit this protein to his benefit?
b. Name the enzyme that use in PCR and
from which bacterium does it get?
Question 48
a. How insulin is synthesized in humans?
b. Why insecticidal protein present in B.
thuringiensis does not kill bacteria?
Question 49
How
human insulin is prepared by recombined DNA technique? Who first successfully
made it?
Question 50
a. How can early detection of disease be
done?
b. What are the most common applications
of PCR?
Question 51
a.
How process of
RNA interference is employed in tobacco plant to avoid infection of nematode?
b.
How infestation
of Meloidegyne incognitia was prevented in tobacco plant?
Question 52
a.
List three
traditional methods of breeding
b.
Enumerate five
steps involved in modern genetic manipulation.
Question 53
What
are the benefits and risks of genetic engineering?
Question 54
2.
Answer the
following
a.
What is a gene?
b.
Define genetics
c.
Write a short on
DNA
Question 55
a.
Nucleotide
consists of three components, name them.
b.
Nitrogenous base
are four components, name them
Question 56
Using
a separate coding table for each, show how the following amino acid are coded
a. Valine and Proline
b. Leucine and Arginine
Question 57
Assuming
the first base code of a sequence are UCAG, the second base code are GACU and
the third base code are UCAG respectively. Using sequence coding table, code
for different proteins (amino acids) and name them.
Question 58
a. Give at least three examples of the
role of genetics in society today
b. Briefly explain why genetics is crucial
to modern biology.
Question 59
What role did genetics play in the development
of the first domesticated plants and animals?
Question 60
Outline
the relations between genes, DNA, and chromosomes
Question 61
Explain
the importance of chromosomes and genes in heredity.
Question 62
Distinguish
between the following pairs of terms:
a)
Chromatids and chromosomes b) Prokaryotic and eukaryotic chromosomes.
Question 63
With the aid of a suitable diagram, show the
structure of a typical eukaryotic chromosome.
Question 64
Explain the four major types of eukaryotic chromosomes
based on centromere position.
Question 65
a. Give reasons why Mendel chose the pea
plant for his experiments.
b. Explain each of the following genetic
terms:
i)Monohybrid,
ii)Dihybrid,
iii)Genotype,
iv)Phenotype,
v)Alleles,
vi)Recessive
gene,
vii)Dominant
gene
Question 66
a. Discuss the bases for Mendel conclusion?
b. If Ebuka is Homozygous Tall and Sandra is Short, using
a test cross show the expected offspring of their children to F4 if they got
married.
Question 67
If Taiwo got married to Emelda who is heterozygous tall, what
will be the phenotype of their children at F2 assuming Taiwo is Tall?
Question 68
State
and explain the two Mendelian laws of inheritance.
Question 69
Explain
the behaviour of chromosomes during meiosis in relation to Mendelian laws of
inheritance.
Question 70
Differentiate
between monohybrid cross and dihybrid cross with an example of each.
Question 71
State
the genotypic and phenotypic ratios of offspring produced at F2, in a
monohybrid cross where there is complete dominance.
Question 72
In
rabbit, brown hair is dominant over white hair. When a pure-breeding brown hair
rabbit is crossed with a pure-breeding white hair rabbit, all the F1 offspring
produced had brown hair
i)
Indicate the genotypes of the parents,
ii)
Indicate with the aid of labeled diagrams how the F1 and F2 offspring are
produced.
Question 73
Illustrate
with the aid of a Punnet square the F2 offspring produced in a dihybrid cross
between Tall and Smooth podded plants X Short and Wrinkled podded plants. Tall
is dominant over Short and Smooth pod over wrinkled pod.
Question 74
Explain the deviations from Mendelian ratio.
Question 76
a. What is the concept of dominance?
b. How does complete dominance differ from incomplete
dominance?
Question 77
a. State the four blood phenotypes of man
and their possible genotypes.
b. Explain each of the following with
suitable examples:
i)
Linkage
ii)
Multiple alleles
iii)
Co dominance
iv)
Lethal genes
Question 78
a. Explain the genetic basis of ABO blood
group
b. Which of the blood groups are referred
to as Universal donor and Universal recipient and why?
Question 79
A
man heterozygous and in blood group A is married to an heterozygous woman in
blood group B. What are the possible blood groups of their offspring?
Question 80
State
the blood phenotype of the following genotypes:(i) IAi, (ii) IAIB, (iii) ii
Question 81
a. What is the most defining difference
between males and females?
b. How do monoecious organisms differ from
dioecious organisms?
Question 82
a. Describe the XX-XO system of sex
determination. In this system, which is the heterogametic sex and which is the
homogametic sex?
b. How is sex determined in insects with
haplodiploid sex determination?
Question 83
a. What is meant by genic sex
determination?
b. How does sex determination in Drosophila
differ from sex determination in humans?
Question 84
a. What characteristics are exhibited by
an X-linked trait?
b. Explain how Bridges’s study of
nondisjunction in Drosophila helped prove the chromosome theory of
inheritance.
Question 85
a. What is mutation?
b. Distinguish between the various types
of mutation.
Question 86
a. When is mutation considered to be
beneficial?
b. Differentiate, with examples, between
physical and chemical mutagens.
Question 87
a. What are the role of mutation in
evolution and variation?
b. What is the difference between types of
mutation and classification of the causes?
Question 88
a. What are genetic variations? State two
causes of variation in nature
b. Distinguish with examples between
heritable and non heritable character
Question 89
a. Explain each of the following terms,
giving four examples of each:
i)
Continuous variation
ii)
Discontinuous variation
b. Classify the following list of variations
into Continuous and Discontinuous
Variations, using the format below: eye colour, tongue rolling, ability
to taste PTC, height, blood groups, intelligence, mass/ weight,
haemophilia Continuous variation,
Discontinuous variation Size Sex of a child.
Question 90
a. Explain the role of meiosis in causing
variation
b. List the three main forms of syndromes
found in human chromosomes.
Question 91
How
many chromosomes would you expect to find in the karyotypes of persons with
Down syndrome, Turner syndrome and Klinefelter syndrome? What are their sex
chromosome genotypes? 8) Describe the physical characteristics of persons with
Down syndrome and Turner syndrome.
Question 92
a. Define Biotechnology.
b. What are the branches of biotechnology
and enumerate them
Question 93
Write
a short note on various biotechnological applications.
Question 94
a. Name the two types of Nucleic acids.
b. State the main components of DNA.
c. Name the four nitrogenous bases found
in DNA and show their specific pairing.
Question 95
a. What is meant by sense and antisense
sequence of DNA?
b. List the applications of Biotechnology
in development.
Question 96
a. Name an abiotic stress that can be
tolerated by the genetic modified crop.
b. Give an example of crop in which
nutritional value is enhanced?
Question 97
a. What is the product of Bt toxin genes?
b. Name two Bt toxin genes which code for
cry protein?
Question 98
a. Name Bt toxin gene which control boll
worm and Bt toxin gene which control corn borer?
b. What is the alternative to enhance crop
yield and minimize the use of fertilizers and chemicals for reducing harmful
effects?
Question 99
a. What is gene therapy?
b. What is unique about transgenic animals?
Question 100
a. Define Green Revolution.
b. What is the significance of traditional
knowledge?
Question 101
a. What are Cry proteins? Name an
organism that produces it. How has man exploit this protein to his benefit?
b. Name the enzyme that use in PCR and
from which bacterium does it get?
Question 102
a. How insulin is synthesized in humans?
b. Why insecticidal protein present in B.
thuringiensis does not kill bacteria?
Question 103
How
human insulin is prepared by recombined DNA technique? Who first successfully
made it?
Question 104
a. How can early detection of disease be
done?
b. What are the most common applications
of PCR?
Question 105
a. How process of RNA interference is employed in tobacco
plant to avoid infection of nematode?
b. How infestation of Meloidegyne incognitia was
prevented in tobacco plant?
Question 106
a. List three traditional methods of breeding
b. Enumerate five steps involved in modern genetic
manipulation.
Question 107
What
are the benefits and risks of genetic engineering?
Question 108
a.
Answer the
following
b.
What is a gene?
c.
Define genetics
d.
Write a short on
DNA
Question 109
a.
Nucleotide
consists of three components, name them.
b.
Nitrogenous base
are four components, name them
Question 110
Using
a separate coding table for each, show how the following amino acid are coded
a. Valine and Proline
b. Leucine and Arginine
Question 111
Assuming
the first base code of a sequence are UCAG, the second base code are GACU and
the third base code are UCAG respectively. Using sequence coding table, code
for different proteins (amino acids) and name them.
Question 112
a. Give at least three examples of the
role of genetics in society today
b. Briefly explain why genetics is crucial
to modern biology.
Question 113
What role did genetics play in the development
of the first domesticated plants and animals?
Question 114
Outline
the relations between genes, DNA, and chromosomes
Question 115
Explain
the importance of chromosomes and genes in heredity.
Question 116
Distinguish
between the following pairs of terms:
a)
Chromatids and chromosomes b) Prokaryotic and eukaryotic chromosomes.
Question 117
With the aid of a suitable diagram, show the
structure of a typical eukaryotic chromosome.
Question 118
Explain the four major types of eukaryotic chromosomes
based on centromere position.
Question 119
a. Give reasons why Mendel chose the pea
plant for his experiments.
b. Explain each of the following genetic
terms:
i)Monohybrid,
ii)Dihybrid,
iii)Genotype,
iv)Phenotype,
v)Alleles,
vi)Recessive
gene,
vii)Dominant
gene
Question 120
a. Discuss the bases for Mendel conclusion?
b. If Ebuka is Homozygous Tall and Sandra is Short, using
a test cross show the expected offspring of their children to F4 if they got
married.
Question 121
If Taiwo got married to Emelda who is heterozygous tall, what
will be the phenotype of their children at F2 assuming Taiwo is Tall?
Question 122
State
and explain the two Mendelian laws of inheritance.
Question 123
Explain
the behaviour of chromosomes during meiosis in relation to Mendelian laws of
inheritance.
Question 124
Differentiate
between monohybrid cross and dihybrid cross with an example of each.
Question 125
State
the genotypic and phenotypic ratios of offspring produced at F2, in a
monohybrid cross where there is complete dominance.
Question 126
In
rabbit, brown hair is dominant over white hair. When a pure-breeding brown hair
rabbit is crossed with a pure-breeding white hair rabbit, all the F1 offspring
produced had brown hair
i)
Indicate the genotypes of the parents,
ii)
Indicate with the aid of labeled diagrams how the F1 and F2 offspring are
produced.
Question 127
Illustrate
with the aid of a Punnet square the F2 offspring produced in a dihybrid cross
between Tall and Smooth podded plants X Short and Wrinkled podded plants. Tall
is dominant over Short and Smooth pod over wrinkled pod.
Question 128
Explain the deviations from Mendelian ratio.
Question 129
a. What is the concept of dominance?
b. How does complete dominance differ from incomplete
dominance?
Question 130
a. State the four blood phenotypes of man
and their possible genotypes.
b. Explain each of the following with
suitable examples:
i)
Linkage
ii)
Multiple alleles
iii)
Co dominance
iv)
Lethal genes
Question 131
a. Explain the genetic basis of ABO blood group
b. Which of the blood groups are referred
to as Universal donor and Universal recipient and why?
Question 132
A
man heterozygous and in blood group A is married to an heterozygous woman in
blood group B. What are the possible blood groups of their offspring?
Question 133
State
the blood phenotype of the following genotypes:(i) IAi, (ii) IAIB, (iii) ii
Question 134
a. What is the most defining difference
between males and females?
b. How do monoecious organisms differ from
dioecious organisms?
Question 135
a. Describe the XX-XO system of sex
determination. In this system, which is the heterogametic sex and which is the
homogametic sex?
b. How is sex determined in insects with
haplodiploid sex determination?
Question 136
a. What is meant by genic sex
determination?
b. How does sex determination in Drosophila
differ from sex determination in humans?
Question 137
a. What characteristics are exhibited by
an X-linked trait?
b. Explain how Bridges’s study of
nondisjunction in Drosophila helped prove the chromosome theory of
inheritance.
Question 138
a. What is mutation?
b. Distinguish between the various types
of mutation.
Question 139
a. When is mutation considered to be
beneficial?
b. Differentiate, with examples, between
physical and chemical mutagens.
Question 140
a. What are the role of mutation in
evolution and variation?
b. What is the difference between types of
mutation and classification of the causes?
Question 141
a. What are genetic variations? State two
causes of variation in nature
b. Distinguish with examples between
heritable and non heritable character
Question 142
a. Explain each of the following terms,
giving four examples of each:
i)
Continuous variation
ii)
Discontinuous variation
b. Classify the following list of variations
into Continuous and Discontinuous
Variations, using the format below: eye colour, tongue rolling, ability
to taste PTC, height, blood groups, intelligence, mass/ weight, haemophilia Continuous variation, Discontinuous
variation Size Sex of a child.
Question 143
a. Explain the role of meiosis in causing
variation
b. List the three main forms of syndromes
found in human chromosomes.
Question 144
How
many chromosomes would you expect to find in the karyotypes of persons with
Down syndrome, Turner syndrome and Klinefelter syndrome? What are their sex
chromosome genotypes? 8) Describe the physical characteristics of persons with
Down syndrome and Turner syndrome.
Question 145
a. Define Biotechnology.
b. What are the branches of biotechnology
and enumerate them
Question 146
Write
a short note on various biotechnological applications.
Question 147
a. Name the two types of Nucleic acids.
b. State the main components of DNA.
c. Name the four nitrogenous bases found
in DNA and show their specific pairing.
Question 148
a. What is meant by sense and antisense
sequence of DNA?
b. List the applications of Biotechnology
in development.
Question 149
a. Name an abiotic stress that can be
tolerated by the genetic modified crop.
b. Give an example of crop in which
nutritional value is enhanced?
Question 150
a. What is the product of Bt toxin genes?
b. Name two Bt toxin genes which code for
cry protein?
Question 151
a. Name Bt toxin gene which control boll
worm and Bt toxin gene which control corn borer?
b. What is the alternative to enhance crop
yield and minimize the use of fertilizers and chemicals for reducing harmful
effects?
Question 152
c.
What is gene
therapy?
d.
What is unique about transgenic animals?
Question 153
a. Define Green Revolution.
b. What is the significance of traditional
knowledge?
Question 154
a. What are Cry proteins? Name an
organism that produces it. How has man exploit this protein to his benefit?
b. Name the enzyme that use in PCR and
from which bacterium does it get?
Question 155
a. How insulin is synthesized in humans?
b. Why insecticidal protein present in B.
thuringiensis does not kill bacteria?
Question 156
How
human insulin is prepared by recombined DNA technique? Who first successfully
made it?
Question 157
a. How can early detection of disease be
done?
b. What are the most common applications
of PCR?
Question 158
a. How process of RNA interference is employed in tobacco
plant to avoid infection of nematode?
b. How infestation of Meloidegyne incognitia was
prevented in tobacco plant?
Question 159
a. List three traditional methods of breeding
b. Enumerate five steps involved in modern genetic
manipulation.
Question 160
What
are the benefits and risks of genetic engineering?
Question 161
Answer the following
a.
What is a gene?
c.
Define genetics
d.
Write a short on
DNA
Question 162
a.
Nucleotide
consists of three components, name them.
b.
Nitrogenous base
are four components, name them
Question 163
Using
a separate coding table for each, show how the following amino acid are coded
a. Valine and Proline
b. Leucine and Arginine
Question 164
Assuming
the first base code of a sequence are UCAG, the second base code are GACU and
the third base code are UCAG respectively. Using sequence coding table, code
for different proteins (amino acids) and name them.
Question 165
a. Give at least three examples of the
role of genetics in society today
b. Briefly explain why genetics is crucial
to modern biology.
Question 166
What role did genetics play in the development
of the first domesticated plants and animals?
Question 167
Outline
the relations between genes, DNA, and chromosomes
Question 168
Explain
the importance of chromosomes and genes in heredity.
Question 169
Distinguish
between the following pairs of terms:
a)
Chromatids and chromosomes b) Prokaryotic and eukaryotic chromosomes.
Question 170
With the aid of a suitable diagram, show the
structure of a typical eukaryotic chromosome.
Question 171
Explain the four major types of eukaryotic chromosomes
based on centromere position.
Question 172
a. Give reasons why Mendel chose the pea
plant for his experiments.
b. Explain each of the following genetic
terms:
i)Monohybrid,
ii)Dihybrid,
iii)Genotype,
iv)Phenotype,
v)Alleles,
vi)Recessive
gene,
vii)Dominant
gene
Question 173
a. Discuss the bases for Mendel conclusion?
b. If Ebuka is Homozygous Tall and Sandra is Short, using
a test cross show the expected offspring of their children to F4 if they got
married.
Question 174
If Taiwo got married to Emelda who is heterozygous tall, what
will be the phenotype of their children at F2 assuming Taiwo is Tall?
Question 175
State
and explain the two Mendelian laws of inheritance.
Question 176
Explain
the behaviour of chromosomes during meiosis in relation to Mendelian laws of
inheritance.
Question 177
Differentiate
between monohybrid cross and dihybrid cross with an example of each.
Question 178
State
the genotypic and phenotypic ratios of offspring produced at F2, in a
monohybrid cross where there is complete dominance.
Question 179
In
rabbit, brown hair is dominant over white hair. When a pure-breeding brown hair
rabbit is crossed with a pure-breeding white hair rabbit, all the F1 offspring
produced had brown hair
i)
Indicate the genotypes of the parents,
ii)
Indicate with the aid of labeled diagrams how the F1 and F2 offspring are
produced.
Question 180
Illustrate
with the aid of a Punnet square the F2 offspring produced in a dihybrid cross
between Tall and Smooth podded plants X Short and Wrinkled podded plants. Tall
is dominant over Short and Smooth pod over wrinkled pod.
Question 181
Explain the deviations from Mendelian ratio.
Question 182
a. What is the concept of dominance?
b. How does complete dominance differ from incomplete
dominance?
Question 183
a. State the four blood phenotypes of man
and their possible genotypes.
b. Explain each of the following with
suitable examples:
i)
Linkage
ii)
Multiple alleles
iii)
Co dominance
iv)
Lethal genes
Question 184
a. Explain the genetic basis of ABO blood group
b. Which of the blood groups are referred
to as Universal donor and Universal recipient and why?
Question 185
A
man heterozygous and in blood group A is married to an heterozygous woman in
blood group B. What are the possible blood groups of their offspring?
Question 186
State
the blood phenotype of the following genotypes:(i) IAi, (ii) IAIB, (iii) ii
Question 187
a. What is the most defining difference
between males and females?
b. How do monoecious organisms differ from
dioecious organisms?
Question 188
a. Describe the XX-XO system of sex
determination. In this system, which is the heterogametic sex and which is the
homogametic sex?
b. How is sex determined in insects with
haplodiploid sex determination?
Question 189
a. What is meant by genic sex
determination?
b. How does sex determination in Drosophila
differ from sex determination in humans?
Question 190
a. What characteristics are exhibited by
an X-linked trait?
b. Explain how Bridges’s study of
nondisjunction in Drosophila helped prove the chromosome theory of
inheritance.
Question 191
a. What is mutation?
b. Distinguish between the various types
of mutation.
Question 192
a. When is mutation considered to be
beneficial?
b. Differentiate, with examples, between
physical and chemical mutagens.
Question 193
a. What are the role of mutation in
evolution and variation?
b. What is the difference between types of
mutation and classification of the causes?
Question 194
a. What are genetic variations? State two
causes of variation in nature
b. Distinguish with examples between
heritable and non heritable character
Question 195
a. Explain each of the following terms,
giving four examples of each:
i)
Continuous variation
ii)
Discontinuous variation
b. Classify the following list of variations
into Continuous and Discontinuous
Variations, using the format below: eye colour, tongue rolling, ability
to taste PTC, height, blood groups, intelligence, mass/ weight, haemophilia Continuous variation, Discontinuous
variation Size Sex of a child.
Question 196
a. Explain the role of meiosis in causing
variation
b. List the three main forms of syndromes
found in human chromosomes.
Question 197
How
many chromosomes would you expect to find in the karyotypes of persons with
Down syndrome, Turner syndrome and Klinefelter syndrome? What are their sex
chromosome genotypes? 8) Describe the physical characteristics of persons with
Down syndrome and Turner syndrome.
Question 198
a. Define Biotechnology.
b. What are the branches of biotechnology
and enumerate them
Question 199
Write
a short note on various biotechnological applications.
Question 200
a. Name the two types of Nucleic acids.
b. State the main components of DNA.
c. Name the four nitrogenous bases found
in DNA and show their specific pairing.
Question 201
a. What is meant by sense and antisense
sequence of DNA?
b. List the applications of Biotechnology
in development.
Question 202
a. Name an abiotic stress that can be
tolerated by the genetic modified crop.
b. Give an example of crop in which
nutritional value is enhanced?
Question 203
a. What is the product of Bt toxin genes?
b. Name two Bt toxin genes which code for
cry protein?
Question 204
a. Name Bt toxin gene which control boll
worm and Bt toxin gene which control corn borer?
b. What is the alternative to enhance crop
yield and minimize the use of fertilizers and chemicals for reducing harmful
effects?
Question 205
a. What is gene therapy?
b. What is unique about transgenic animals?
Question 206
a. Define Green Revolution.
b. What is the significance of traditional
knowledge?
Question 207
a. What are Cry proteins? Name an
organism that produces it. How has man exploit this protein to his benefit?
b. Name the enzyme that use in PCR and
from which bacterium does it get?
Question 208
a. How insulin is synthesized in humans?
b. Why insecticidal protein present in B.
thuringiensis does not kill bacteria?
Question 209
How
human insulin is prepared by recombined DNA technique? Who first successfully
made it?
Question 210
a. How can early detection of disease be
done?
b. What are the most common applications
of PCR?
Question 211
a. How process of RNA interference is employed in tobacco
plant to avoid infection of nematode?
b. How infestation of Meloidegyne incognitia was
prevented in tobacco plant?
Question 212
a. List three traditional methods of breeding
b. Enumerate five steps involved in modern genetic
manipulation.
Question 213
What
are the benefits and risks of genetic engineering?
