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Principles of Inheritance and Variation question

2023 · Q5
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Principles of Inheritance and Variation question

2023 · Q5

NEETBiologyPrinciples of Inheritance and VariationMCQ+4 / −1

Match List - I with List - II.

List - I List - II
(A) Monohybrid Cross (I) 1 : 1
(B) Dihybrid Cross (II) 1 : 2 : 1
(C) Incomplete dominance (III) 3 : 1
(D) Test Cross (IV) 9 : 3 : 3 : 1

Choose the correct answer from the options given below :

  1. A
    (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
  2. B
    (A)-(II), (B)-(IV), (C)-(III), (D)-(I)
  3. C
    (A)-(II), (B)-(III), (C)-(IV), (D)-(I)
  4. D
    (A)-(IV), (B)-(III), (C)-(I), (D)-(II)
View written solutionFree

Correct answer: A

Option A : (A)-(III), (B)-(IV), (C)-(II), (D)-(I)

Explanation :

(A) Monohybrid Cross : Monohybrid crosses are those that involve one pair of contrasting traits. In monohybrid crosses, the phenotypic ratio of the F2 generation is typically 3:1 (III).

(B) Dihybrid Cross : Dihybrid crosses are those that involve two pairs of contrasting traits. In dihybrid crosses, the phenotypic ratio of the F2 generation is typically 9:3:3:1 (IV).

(C) Incomplete Dominance : Incomplete dominance is when neither allele for a specific trait is dominant over the other. As a result, the phenotype of the heterozygote is somewhere in between the two homozygotes. The phenotypic ratio in such a case is typically 1:2:1 (II).

(D) Test Cross : A test cross involves crossing an individual exhibiting the dominant phenotype (but unknown genotype) with a homozygous recessive individual. The phenotypic ratio can be 1:1 (I) if the dominant individual was a heterozygote. If the dominant individual was a homozygote, all offspring will exhibit the dominant phenotype.

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