NEET Solved Paper 2019 Question 53

Question: 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? [NEET 5-5-2019]

Options:

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)

Show Answer

Answer:

Correct Answer: A

Solution:

  • If A - 0.4, then a - 0.6 So, AA = 0.4 $ \times $ 0.4 = 0.16 Aa = 0.4 $ \times $ 0.6 = 0.24 Aa = 0.6 $ \times $ 0.6 = 0.36