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?
0.36(AA); 0.48(Aa); 0.16(aa)
0.16(AA); 0.24(Aa); 0.36(aa)
0.16(AA); 0.48(Aa); 0.36(aa)
0.16(AA); 0.36(Aa); 0.48(aa)
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) = p^2 = (0.4)^2 = 0.16. Frequency of heterozygous individuals (Aa) = 2pq = 2(0.4)(0.6) = 0.48. Frequency of homozygous recessive individuals (aa) = q^2 = (0.6)^2 = 0.36.
Join thousands of students and practice with AI-generated mock tests.