INHERITANCE AND VARIATION (I) biology MCQ’s questions answers

 

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INHERITANCE AND VARIATION (I)

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Question 1
Which of the following conditions represents a case of co-dominance genes?
A
A gene expresses itself, suppressing the phenotypic effect of its alleles.
B
Genes that are similar in phenotypic effect when present separately, but when together interact to produce a different trait.
C
Alleles, both of which interact to produce a trait, which may or may not resemble either of the parental types.
D
Alleles, each of which produces an independent effect in a heterozygous condition.
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Question 2
A human female with turner's syndrome
A
has 45 chromosomes with XO
B
has one additional X-chromosome
C
exhibits male characters
D
is able to produce children with normal husband
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Question 3
If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is
A
0
B
0.5
C
0.75
D
1
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Question 4
Which of the following terms best describes when the phenotype of the heterozygote differs from the phenotypes of both homozygotes?
A
Incomplete dominance
B
Multiple alleles
C
Co dominance
D
Epistasis
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Question 5
If dihybrid mulatto male (AaBb) is crossed with white female, then the ratio of mulatto and white offspring will be-
A
1:6
B
1:1
C
4:1
D
2:1
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There are 5 questions to complete.

 

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