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 homozygous aa group?

Question

BlackTom AI · Accepted Answer

The prompt presents a population genotype composition and asks about the number of A alleles within the homozygous aa group.
First, identify what homozygous aa means: individuals with genotype aa possess two copies of the 'a' allele and zero copies of the 'A' allele.
Therefore, each individual in the aa group contributes 0 A alleles.
Next, determine how many individuals are in the homozygous aa group: 25 individuals.
Total A alleles contributed by the aa group = 25 individuals × 0 A alleles per individual = 0 A alleles in total from the aa group.
Note that there are no answer options provided to evaluate, so we focus on the calculation based on the definition of the genotype and allele counting.
In summary, since all members of the homozygous aa group carry only the 'a' allele, the number of A alleles in that group is 0.

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 homozygous aa group?

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