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MEDIUM
ENGLISH
Agriculture
Epitasis implies_____________________?
A
One gene pair enhances phenotype expression of another gene pair
Option A
B
Many gene together control a parucular phenotype
Option B
C
One pair of gene can completely mask the expression of another gene pair
Option C
D
One gene pair independently controls a phenotype
Option D
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MEDIUM
ENGLISH
Agriculture
After self pollination of red flowered plants out of 40 plants of progeny were white flowered. this indicates that the plants are__________________?
A
Heterogeneous
Option A
B
Heterozygous
Option B
C
Homogenous
Option C
D
Homozygous
Option D
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MEDIUM
ENGLISH
Agriculture
haploids are better for mutation studies because in them all the mutations whether recessive or dominant are expressed as_______________?
A
There are many alleles of each gene in each call
Option A
B
There are two alleles of each gene in each cell
Option B
C
There is only one alleles of each gene present in each cell
Option C
D
Non3e4 of the above
Option D
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MEDIUM
ENGLISH
Agriculture
Red (RR) is crossed with white (ww). All the (Rw) offsprings are pink this is an indication that the R gene is_________________?
A
Recessive
Option A
B
Incomplete dominant
Option B
C
Mutant
Option C
D
Dominant
Option D
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MEDIUM
ENGLISH
Agriculture
Hereditary variations in plants have been produced by the use of________________?
A
DDT
Option A
B
X-rays
Option B
C
Gibberrellic acid
Option C
D
Auxins
Option D
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MEDIUM
ENGLISH
Agriculture
Which of the following had great influence on Drawing during during formulation of his theory of natural selection_________________?
A
Lamark’s idea on inheritance of acquired character’s
Option A
B
Mathis’s essay on population
Option B
C
Mendes’s experiment on pea
Option C
D
De Vries theory of mutation
Option D
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MEDIUM
ENGLISH
Agriculture
The organic evolution look place about__________________?
A
100,000,000 years
Option A
B
200,000,000 ears
Option B
C
300,000,000 years
Option C
D
Still occurring
Option D
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MEDIUM
ENGLISH
Agriculture
In a monohybrid cross, 2 heterozygous individuals were crossed, phenotypic ratio came to be (2:1), it is due to__________________?
A
Dominant lethal genes in heterozygous individuals
Option A
B
Dominant lethal genes in homozygous individuals
Option B
C
Dominant epistasis
Option C
D
None of the above
Option D
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MEDIUM
ENGLISH
Agriculture
If the haploid number of chromosomes in a plant is 12, then the number of chromosomes in monosmic is_________________?
A
12
Option A
B
24
Option B
C
22
Option C
D
23
Option D
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MEDIUM
ENGLISH
Agriculture
Presence of slight differences in identical twins support the hypothesis that___________________?
A
Single gene may produce multiple effects
Option A
B
Dominance may be incomplete
Option B
C
The environment effects the expression of genetic character
Option C
D
Genetic trails are influence by many genes
Option D
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MEDIUM
ENGLISH
Agriculture
Superiority of heterozygote in respect to one or more traits in comparison to corresponding homozygote is known as____________________?
A
Heterocyst
Option A
B
Hetropyenosis
Option B
C
Hypostasis
Option C
D
Epistastasis
Option D
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MEDIUM
ENGLISH
Agriculture
Mutant allele that has little or no effect on the expression of a tart is known as_____________________?
A
Atavism
Option A
B
Auxotroph
Option B
C
Axoneme
Option C
D
Armor
Option D
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MEDIUM
ENGLISH
Agriculture
A useful process for determining whether an individual is homozygous or heterozygous is_____________________?
A
Cross breeding
Option A
B
Back crossing
Option B
C
Self fertilization
Option C
D
Inbreeding
Option D
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MEDIUM
ENGLISH
Agriculture
Episodes may be factor in____________________?
A
Dominance
Option A
B
Cytoplasm inheritance
Option B
C
Incomplete dominance
Option C
D
Chromosomal inheritance
Option D
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MEDIUM
ENGLISH
Agriculture
Evolution may be described as___________________?
A
History of development of larger biological units
Option A
B
Cntinuous genetic variation
Option B
C
Inheritance of acquired characters
Option C
D
Discontinuous genetic variation
Option D
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MEDIUM
ENGLISH
Agriculture
Organism arise from existing forms by genetic variations is called_________________?
A
Mutation
Option A
B
Genetics
Option B
C
Genetics
Option C
D
Hybridization
Option D
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MEDIUM
ENGLISH
Agriculture
Mendel was lucky to use pea plants for genetical experiments because__________________?
A
They showed one type of flowers
Option A
B
they belong to the family leguminous
Option B
C
The seven characters he studied were on different chromosomes
Option C
D
They have round seeds with lot of proteins
Option D
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MEDIUM
ENGLISH
Agriculture
The most recent evolved plant group is ____________________?
A
Confers
Option A
B
Mosses
Option B
C
grasses
Option C
D
Gymnosperm
Option D
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MEDIUM
ENGLISH
Agriculture
If a pure tall plant is crossed with a pure dwarf one, the ratio of tall pure dwarf in the F 2 generation after selling F1 plant will be___________________?
A
1:1
Option A
B
1:2
Option B
C
2:1
Option C
D
3:1
Option D
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MEDIUM
ENGLISH
Agriculture
Polyploidy is most likely to result from ____________________?
A
Occurrence of crossing over
Option A
B
The crossing over between non homologous chromosomes
Option B
C
Occurrence of karyokinesis
Option C
D
The failure of homologous chromosomes to separate during meiosis
Option D
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