Biology - Genetics - Basic - Punnett squares - How to Use Punnett Squares

A worked example showing how to solve a genetics problem step by step. Problem: 'In mice, brown fur (B) is dominant over white fur (b). A heterozygous brown mouse (Bb) is crossed with a white mouse (bb). What fraction of offspring will be white?' Step 1: 'Identify parent genotypes: Parent 1 = Bb, Pa