AIIMS2018Botany-Biology

AIIMS 2018 Botany Biology MCQ Question

Type: MCQ-conceptual-Medium-Class 12

Which of the following statement confirm the law of dominance

A

3:1 ratio in F₂ generation

B

It is the conclusion of a dihybrid cross

C

Alleles do not show any blending and both characters recovered as such in F₂ generation

D

Alleles of a pair segregate from each other such that gamete receives only one of the two factors

Correct Answer

Option A

Detailed Explanation

The correct answer is A) 3:1 ratio in F₂ generation because it directly illustrates the law of dominance, which states that when two different alleles for a trait are present, the dominant allele will mask the effect of the recessive allele. In a typical monohybrid cross, the F₂ generation exhibits a phenotypic ratio of 3 dominant traits to 1 recessive trait, confirming that the dominant allele is expressed while the recessive allele remains hidden in the presence of the dominant allele.

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