Multiple choice

Directions: Following question consists of two statements, one labeled as 'Assertion A' and the other labeled as 'Reason R'. You are to examine these two statements carefully and decide if the Assertion (A) and the Reason (R) are individually true and if so, whether the Reason is a correct explanation for Assertion. Select your answer from the codes given below.

A : A recessive trait expresses only in homozygous condition R : The allels will segregate at the time of gamete formation

  1. Both (A) and (R) are true and (R) is the correct explanation of (A)

  2. Both (A) and (R) are true and (R) is not the correct explanation of (A)

  3. (A) is true, but (R) is false

  4. (A) is false, but (R) is true
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The assertion is true: recessive traits only express phenotypically in homozygous recessive conditions (rr) because the dominant allele masks their effect. The reason is also true: alleles do segregate during gamete formation (Mendel's first law). However, the reason does NOT explain the assertion - segregation is about allele separation, not about why recessive traits are masked. The explanation for recessive expression relates to dominance relationships and protein function/dosage, not segregation mechanics.

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