In a population of 100 individuals, we have 25 people that are homozygous AA, 50 people that are heterozygous Aa, and 25 people that are homozygous aa. How many A alleles are in the heterozygous Aa group?

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BlackTom AI · Accepted Answer

To solve this, first identify how many A alleles are present specifically in the heterozygous Aa group.

- Each heterozygous Aa individual carries one A allele (and one a allele).
- There are 50 individuals in the Aa group.
- Therefore, the total number of A alleles in the Aa group = 50 individuals × 1 A allele per individual = 50 A alleles.

For additional context, if you were asked about the total number of A alleles in the entire population: AA individuals contribute 2 A alleles each, Aa individuals contribute 1, and aa individuals contribute 0. That would be 25×2 + 50×1 + 25×0 = 50 + 50 + 0 = 100 A alleles in total. This cross-check helps validate that the numbers are internally consistent, even though it isn’t required for the specific question about the Aa group.

ANTH 246 OL2 SP25: Forensic Science (Antoniuk, C)

In a population of 100 individuals, we have 25 people that are homozygous AA, 50 people that are heterozygous Aa, and 25 people that are homozygous aa. How many A alleles are in the heterozygous Aa group?

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