Question: Calculate the frequency of the AA, Aa, and aa genotypes after one generation if the initial population consists of 0.2 AA, 0.6 Aa, and 0.2 aa.

What I have done is:

P = (0.2)+(0.5)(0.6)= 0.50

q = 1-p = 1 - 0.50 = 0.50

Can someone check my answer plz.

http://www.kursus.kvl.dk/shares/vetgen/_Popgen/genetik/applets/mating.htm

Correct.

To calculate the frequency of the AA, Aa, and aa genotypes after one generation, you can use the Hardy-Weinberg equation. This equation states that in a population in equilibrium, the frequency of the AA genotype (p^2) is equal to the square of the frequency of the A allele (p), the frequency of the aa genotype (q^2) is equal to the square of the frequency of the a allele (q), and the frequency of the heterozygous Aa genotype (2pq) is equal to 2 times the frequency of the A allele multiplied by the frequency of the a allele.

Here's the step-by-step calculation:

1. Given that the initial population consists of 0.2 AA, 0.6 Aa, and 0.2 aa, we can determine the allele frequencies:
AA frequency (p^2) = 0.2
Aa frequency (2pq) = 0.6
aa frequency (q^2) = 0.2

2. Since the AA genotype frequency (p^2) is 0.2, we can take the square root of this value to find the frequency of the A allele (p):
p = sqrt(0.2) = 0.447

3. Similarly, since the aa genotype frequency (q^2) is 0.2, we can take the square root of this value to find the frequency of the a allele (q):
q = sqrt(0.2) = 0.447

4. Now we can calculate the frequency of the Aa genotype (2pq):
2pq = 2 * 0.447 * 0.447 = 0.4

Therefore, after one generation, the frequency of the AA genotype is 0.2, the frequency of the Aa genotype is 0.4, and the frequency of the aa genotype is 0.2.

In your calculations, you correctly found the frequency of the A allele (p) and the frequency of the a allele (q). However, the Aa genotype frequency should be 2pq, not 0.5 multiplied by 0.6 as you mentioned. Your answer of 0.5 is the sum of the frequencies of the AA and Aa genotypes, which is not accurate.

To cross-check your answer, you can also use the online calculator you provided. Just enter the initial genotype frequencies (0.2, 0.6, and 0.2) and click "Calculate" to obtain the frequencies after one generation. If the calculated frequencies match the ones you found, then your answer is correct.