In a **monoecious**
species, for a **single locus** with **two**
alleles **A** & **a**:

Let frequency of **A**
allele **f(A) = p**

Let frequency of **a**
allele **f(a) = q**

Let allele frequenices
in males & females be equal.

What are the **expected
genotype frequencies**?

What are the
**probabilities**
of obtaining various gametic combinations?

prob. of **A** from male & **A** from female:
**p _{m} x p_{f }= p^{2}**

prob. of

prob. of

or

What is the result
of the **binomial expansion **of **p** & **q** in males &
females

**
(p _{m} + q_{m}) (p_{f} + q_{f}) = p^{2}
+ 2pq + q^{2}**

What are the areas
of the four boxes in a **Punnet Square**?

By all three methods: f(AA) = p

All text material © 2004 by Steven M. Carr