Q. No.Which of the following terms best describes when the phenotype of the heterozygote differs from the phenotypes of both homozygotes?
(1) Incomplete dominance
(2) Multiple alleles
(3) Codominance
(4) Epistasis
How many unique gametes could be produced through independent assortment by an individual with the genotype AaBbCCDdEE?
(1) 4
(2) 8
(3) 16
(4) 32
In chickens, gene R produces a rose-shaped comb, gene r produces a single comb, gene P produces pea-shaped comb and gene p produces a single comb. When P and R are both present in the genotype, the comb is walnut shaped. Two chickens with genotype RrPp are intercrossed. What will be the ratio of Walnut shaped, Rose shaped, Pea shaped and single comb progeny respectively:
(1) 3 : 1 : 1 : 3
(2) 1 : 1: 1 : 1
(3) 9 : 3 : 3 : 1
(4) 12 : 3 : 4
A man of blood group A marries a woman of AB blood group. Which type of progeny would indicate that man is heterozygous A?
(1) AB
(2) A
(3) O
(4) B
In a cross between AABB X aabb, the ratio of F2 genotypes between AABB, AaBB, Aabb and aabb would be:
(1) 9 : 3 : 3 : 1
(2) 2 : 1 : 1 : 2
(3) 1 : 2 : 2 : 1
(4) 7 : 5 : 3 : 1
Two heterozygous round yellow seeded pea plants are intercrossed. In the progeny, the trait for seed shape will segregate in the ratio:
(1) 1 : 1
(2) 3 : 1
(3) 1 : 1 : 1 : 1
(4) 9 : 3 : 3 : 1
Given the parents AABBCc × AabbCc, assume simple dominance and independent assortment. What proportion of the progeny will be expected to phenotypically resemble the first parent?
(1) 1/4
(2) 1/8
(3) 3/4
(4) 3/8
The gene for eye color in a certain organism has seven alleles. How many genotypic combinations are possible?
(1) 2
(2) 14
(3) 28
(4) 56
The minimum progeny population size allowing for random union of all kinds of gametes from AaBbCc parents is:
(1) 9
(2) 16
(3) 27
(4) 64
In guinea pigs, black coat color is a dominant trait and white is a recessive trait. When heterozygous black pigs are intercrossed the chance of the first two offspring being black is:
(1) 75 %
(2) 56 %
(3) 44 %
(4) 6 %
(1) 75 %
(2) 56 %
(3) 44 %
(4) 6 %
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