Genetics: Codominance Definitions

Codominance Overview

• Codominance occurs when two alleles in a gene pair are both expressed in the phenotype without one overshadowing the other.
• This genetic scenario is distinct from typical dominance patterns where one allele can dominate the other (dominant vs. recessive).

Codominant Alleles

• Codominant alleles are pairs of alleles that equally influence the trait observed in a heterozygote organism.
• In this case, the phenotype displays characteristics from both alleles, unlike in situations involving dominant and recessive alleles where only the dominant trait may be expressed.

Expression of Phenotypes

• The expression in codominance results in a phenotype that differs from both of the homozygous individuals associated with the alleles.
• This unique phenotype showcases the contributions from both alleles simultaneously, reflecting their combined effects.

This quiz focuses on the concept of codominance in genetics, providing definitions and explanations for key terms. Each card highlights important aspects of codominant alleles and their implications in phenotypes. Test your understanding of these fundamental genetics concepts.