According to the Hardy-Weinberg principle, the frequency of genotypes is given by the expansion (p + q)² = p² + 2pq + q² = 1, where 'p' is the frequency of allele A and 'q' is the frequency of allele a . Given: Frequency of allele A (p) = 0.4. Therefore, Frequency of allele a (q) = 1 - 0.4 = 0.6.

• Frequency of Homozygous Dominant (AA) = p² = (0.4)² = 0.16.
• Frequency of Heterozygous (Aa) = 2pq = 2 × 0.4 × 0.6 = 0.48.
• Frequency of Homozygous Recessive (aa) = q² = (0.6)² = 0.36.