An organism with two copies of the same allele is:

(1) Homozygous for that trait

(2) Homologous for the allele

(3) Heterozygous for that trait

(4) Heterologous for the allele

Subtopic:  Monohybrid Cross: 1 |
 74%
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NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following about the law of segregation is true?

(1) It states that each of two alleles for a given trait segregate into same gametes.

(2) It can be explained by the segregation of heterologous chromosomes during meiosis.

(3) It can account for the 3:1 ratio seen in the F2 generation of Mendelʹs crosses.

(4) It is a method that can be used to determine the number of chromosomes in a plant.

Subtopic:  Law of Segregation |
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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 %

Subtopic:  Law of Segregation |
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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

Subtopic:  Dihybrid Cross Analysis |
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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

Subtopic:  Dihybrid Cross: Details |
 73%
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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

Subtopic:  Dihybrid Cross: Details |
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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

Subtopic:  Dihybrid Cross: Details |
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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

Subtopic:  Dihybrid Cross: Details |
 52%
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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

Subtopic:  Dominance Deviation from Mendel: 1 |
 76%
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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

Subtopic:  Dominance Deviation from Mendel: 2 |
 54%
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