NEET-XII-Physics
Previous Year Paper year:2017
- #151A 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?
(1) 0.36(AA); 0.48(Aa); 0.16(aa)
(2) 0.16(AA); 0.24(Aa); 0.36(aa)
(3) 0.16(AA); 0.48(Aa); 0.36(aa)
(4) 0.16(AA); 0.36(Aa); 0.48(aa)digAnsr: 3Ans : ( 3 )
Sol. Frequency of dominant allele (say p) = 0.4
Frequency of recessive allele (say q)
= 1 - 0.4 = 0.6
∴ Frequency of homozygous dominant
individuals (AA)
= p2 = (0.4)2 = 0.16
Frequency of heterozygous individuals (Aa)
= 2pq = 2(0.4)(0.6) = 0.48
Frequency of homozygous recessive
individuals (aa)
= q2 = (0.6)2 = 0.36