Codominance (AQA A-Level Biology): Flashcards

Both alleles equally expressed in phenotype

Shows both allelic expressions simultaneously

Enzyme catalyzes red pigment formation in hair follicles

Homozygous for pigment-producing allele ($C^R C^R$)

Homozygous for non-functional allele ($C^W C^W$)

Heterozygous, mixed red and white hairs ($C^R C^W$)

Uses superscript letters, not upper/lower case

Allele for red pigment production

Allele for no pigment production (white)

1:2:1 (25% red, 50% roan, 25% white)