Mendel and Hardy-Weinberg

Alleles and Gametes

A heterozygote carries two allele copies, and each gamete receives one.

highlighted = computed this step

A heterozygote carries two alleles

A single gene can have two allele copies. In Aa, one copy is A and the other is a.

genotype=Aa\text{genotype}=\text{Aa}
Gametes from AaGamete probabilities are computed from the heterozygote.GameteProbabilityA1/2a1/2

Each gamete gets one allele

Gametes receive one allele from the pair. For Aa, A has probability 1/2, and a has the same probability.

P(A)=12,P(a)=12P(A)=\frac{1}{2},\quad P(a)=\frac{1}{2}
Gametes from AaGamete probabilities are computed from the heterozygote.GameteProbabilityA1/2a1/2