The A¹allele mutates into the A² allele at a rate of 4 × 10^-5 and the A² allele mutates into the A¹ allele at a rate of 1 × 10^-5. Assuming no other evolutionary forces are at work, the frequency of the A² allele will eventually be:

Question

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The equilibrium frequency of the A² allele is calculated using the formula: frequency of A² = mutation rate of A¹ to A² / (mutation rate of A¹ to A² + mutation rate of A² to A¹) = 4 × 10^-5 / (4 × 10^-5 + 1 × 10^-5) = 0.8.

The A1 allele Mutates into the A2 Allele at a Rate

The A¹allele Mutates into the A² Allele at a Rate