Question
Asked Jan 27, 2020
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A population is made up of individuals where 77 have the A1A1 genotype, 65 have the A1 A2 genotype, and 123 have the A2A2 genotype. What is the allele frequency of A1? Answer to 2 decimal places.

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Expert Answer

Step 1

The Hardy–Weinberg principle:

It is also referred to as the Hardy–Weinberg model, equilibrium, law, or theorem. It states that the genotype and allele frequencies will remain constant in a population from generation to generation in the lack of other evolutionary impacts.

Step 2

The Hardy Weinberg equations are placed on the board:

From the given details:

p2 denotes the frequency of A1A1 genotype (77 individuals).

q2 denotes the frequency of A2A2 genotype (123 individuals).

2pq denotes the frequency of A1A2 genotype (65 individuals).

p represents the frequency of A1 allele and q represents the frequency of allele A2.

Biology homework question answer, step 2, image 1
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Step 3

The allele A1 frequency can be calculated as follows:

The total number of individuals of the populatio...

Biology homework question answer, step 3, image 1
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