NEET2019Zoology-Genetics
NEET 2019 Zoology Population Genetics MCQ Question
Type: MCQ-numerical-Medium-Class 12
A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?
A
0.16 (AA); 0.48 (Aa); 0.36 (aa)
B
0.16 (AA); 0.36 (Aa); 0.48 (aa)
C
0.36 (AA); 0.48 (Aa); 0.16 (aa)
D
0.16 (AA); 0.24 (Aa); 0.36 (aa)
Correct Answer
Option A
Detailed Explanation
Using Hardy-Weinberg principle: p = 0.4, q = 0.6. Homozygous dominant (AA) = p² = 0.16, heterozygous (Aa) = 2pq = 0.48, homozygous recessive (aa) = q² = 0.36.
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