Codominance: Understanding the Phenotypic Effects of Two Alleles for a Gene

The video explains codominance, where two alleles affect the phenotype equally. It provides examples such as ABO blood groups in humans and feather color in hens. In ABO blood groups, alleles IA and IB are codominant, while IO is recessive. In hens, alleles for black and white feathers are codominant, resulting in speckled feathers. The video concludes with a summary of these concepts.

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