Incomplete Dominance vs. Codominance quiz Flashcards

Codominance is a pattern of inheritance where heterozygotes with two different alleles equally express both phenotypes from each allele in patches.

In codominance, both alleles are equally expressed without blending, while in incomplete dominance, the heterozygote shows a blended intermediate phenotype.

An example of codominance in flowers is when a red flower allele and a white flower allele result in a flower with patches of both red and white.

The 'co' in codominance signifies 'together,' indicating that both alleles dominate together.

A Punnett square helps predict the genotypes and phenotypes of offspring, showing how both alleles are equally expressed in codominance.

The phenotype of a heterozygote in codominance shows both parental traits equally, such as patches of red and white in flowers.

Epistasis is when one gene's product affects the phenotype of another gene.

In human blood type, the H protein is necessary to attach A and B molecules to red blood cells; without a functional H protein, a person will have type O blood regardless of their IA or IB alleles.

The H protein connects A and B molecules to the surface of red blood cells; without it, even IA or IB alleles result in type O blood.

In epistasis, the presence of a functional or non-functional H protein determines whether A or B molecules can be attached to red blood cells, affecting the blood type phenotype.