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🧬ap biology review

Codominance in AP Biology

Verified for the 2027 exam
Verified for the 2027 exam•Fiveable Content Team

Definition

Codominance is a relationship between two versions of a gene. Individuals receive one version of a gene, called an allele, from each parent. If the two alleles are different, they will both be expressed equally in the phenotype.

This definition is part of Fiveable's AP Biology review, which also has guided practice questions.