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 alleles total are in this population?

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BlackTom AI · Accepted Answer

We start by restating the problem to ensure understanding: there are 100 individuals in the population, with 25 AA, 50 Aa, and 25 aa.

To count total alleles in the population, remember that each individual carries two alleles for a given gene.

Step 1: Determine the total number of alleles per individual across the population. Since every individual has two alleles, the population contributes 2 alleles per person.

Step 2: Multiply by the number of individuals. 2 alleles per person × 100 individuals = 200 alleles in total.

Alternate way to view it: regardless of genotype distribution (AA, Aa, aa), the total allele count is always twice the number of individuals when counting both copies of the gene in every individual.

Thus, the population contains 200 alleles in total.

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 alleles total are in this population?

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