Part of Lesson Plan: Punnett Squares and Codominance

Activity Overview / Details

1. This is a situation where both alleles contribute to the phenotype. For example, in certain varieties of chickens, the allele for black feathers is codominant with the allele for white feathers. Heterozygous chickens have a color described as "erminette" which is speckled with black and white feathers. Unlike incomplete dominance the blending of the black and white does not result in gray because the black and white colors are separate and only appear (flash several pictures of codominant colored animals on the screen or just pictures.)
2. Prepare to capture the notes to practice how to determine codominance.