Question

The frequency of an autosomal recessive Allele is 0.4. Then what will be the frequency of heterozygotes in progeny among 4000 individual ?
(1) 2000 (2) 1920 (3) 2400 (A) 1600​

Answer 1

The frequency of the recessive allele is q=0.4 (given)

Hence, p=1−0,4=0.6 (as p = 1- q)

According to Hardy- Weinberg principle, p

2

+ 2pq + q

2

=1

hence, p

2

=(0.6)

2

=0.36

q

2

=(0.4)

2

=0.16

2pq=0.48

since, 2pq is the frequency of hetrozygous carrier,

= 0.48×200

= 96 Individuals

So, the correct answer is

′

96