31.
The arrangement of distance between gene should be additive" is not perfectly true because of
A
Synaptonemal complex
B
Crossing over
C
Double cross over
D
Penetrance
Answer :
Double cross over
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32.
On selfing a plant of $${F_1}$$ generation with genotype $$"AABbCC",$$ the genotypic ratio in $${F_2}$$ generation will be
A
3 : 1
B
1 : 2 : 1
C
9 : 3 : 3 : 1
D
27 : 9 : 9 : 9 : 3 : 3 : 3 : 1
Answer :
1 : 2 : 1
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33.
RR(red) is crossed with ww (white). All Rw offsprings are pink. This indicates that R-gene is
A
Hybrid
B
Incompletely dominant
C
Recessive
D
Mutant
Answer :
Incompletely dominant
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34.
On which continant maximum fossils of prehistoric man have been recoverd
A
Europe
B
Asia
C
America
D
Africa
Answer :
Africa
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35.
Wings of insects and wings of birds are the examples of
A
Analogy
B
Homology
C
Serology
D
Mimicry
Answer :
Analogy
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36.
Crossing over that results in genetic recombination in higher organisms occurs between
A
sister chromatids of a bivalent
B
non-sister chromatids of a bivalent
C
two daughter nuclei
D
two different bivalents
Answer :
non-sister chromatids of a bivalent
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37.
Which one pair of the following parents is most likely to get a child who suffer from hemolytic disease of new born?
A
Rh-negative mother and Rh-positive father
B
Rh-positive mother and Rh-negative father
C
Rh-negative mother and Rh-negative father
D
Rh-positive mother and Rh-positive father
Answer :
Rh-negative mother and Rh-positive father
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38.
Breeding is possible between two member of
A
Genus
B
Family
C
Order
D
Species
Answer :
Species
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39.
Agrobacterium tumefaciens used in Genetic engineering for
A
DNA-mapping
B
DNA-modification
C
Vector
D
DNA finger printing
Answer :
Vector
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40.
Mutation causes normally
A
Small changes
B
Negligible changes
C
Large changes
D
No change
Answer :
Large changes
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