hardyweinberg problem The allele for unattached ear lobes is

hardy-weinberg problem

The allele for unattached ear lobes is dominant over the allele for attached earlobes. In a population of 500 individuals, 25% show the recessive phenotype. How many individuals would you expect to be homozygous dominant and how many would be heterozygous for this trait? Choose the letters you will use to represent the alleles & genotypes: Translate to known frequencies: Choose which Hardy-Weinberg formula you will primarily use: Solve. Neatly show work below. Write final answer in box.

Solution

Dominant allele =A

Recessive allele=a

We know that p2 + q2 + 2pq=1

Therefore q2 (aa) =. 25 since q is given 25%

P2 (AA) =. 25 x 500 =125 homozygous dominant

2pq (Aa) =.50x500 = 250 heterozygous dominant