NEET UG BIOLOGY MCQ: PRINCIPLE OF INHERITANCE AND VARIATION

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If the frequency of a recessive phenotype in a stable population is

25\%

, the frequency of the
dominant allele in that population is?

View answer and explanation

Correct option: A

50\,\%

Option A (

50\,\%

) is correct because if the frequency of the recessive phenotype (q²) is 25%, then the frequency of the recessive allele (q) is

\sqrt{0.25} = 0.5

, and the frequency of the dominant allele (p) is

1 - q = 1 - 0.5 = 0.5

or 50%.

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