AP BIOLOGY

Detailed explanation-1: -codominance, in genetics, phenomenon in which two alleles (different versions of the same gene) are expressed to an equal degree within an organism. As a result, traits associated with each allele are displayed simultaneously. An example of codominance is seen in the MN blood group system of humans.

Detailed explanation-2: -In codominance a heterozygous individual expresses both simultaneously without any blending. An example of codominance is the roan cow which has both red hairs and white hairs. In incomplete dominance a heterozygous individual blends the two traits.

Detailed explanation-3: -What Is a Codominant Trait? Codominance occurs when two heterozygous alleles are fully expressed. Neither allele can dominate, so they both show up, but they do not blend. The prefix co-means “together” so you can use that to remember that “both alleles show up together".

Detailed explanation-4: -Codominance means that both phenotypes show simultaneously, so the heterozygote would be both red and white, which is a distinct third phenotype. These organisms would show spots or splotches of each color.

Detailed explanation-5: -Indeed, “codominance” is the specific term for a system in which an allele from each homozygote parent combines in the offspring, and the offspring simultaneously demonstrates both phenotypes. An example of codominance occurs in the human ABO blood group system.