In a population of 1000 individuals, 360 belong to genotype AA, 480 to Aa and the remaining 160 to aa. Based o

Question

In a population of 1000 individuals, 360 belong to genotype AA, 480 to Aa and the remaining 160 to aa. Based on this data, the frequency of allele A in the population is:

Accepted Answer

According to the NCERT text regarding the Hardy-Weinberg principle, allele frequencies can be calculated from genotype data. In a diploid population, each individual carries two alleles.

Total alleles = 1000 individuals × 2 = 2000 alleles.
Number of 'A' alleles = (360 AA × 2) + (480 Aa × 1) = 720 + 480 = 1200.
Frequency of allele 'A' = 1200 / 2000 = 0.6.

Alternatively, frequency of A (p) = Frequency(AA) + ½ Frequency(Aa) = 0.36 + 0.24 = 0.6 .

Step-by-Step Solution

Practice All BIOLOGY Questions