AP BIOLOGY

Detailed explanation-1: -Codominance Definition Codominance is a form of inheritance wherein the alleles of a gene pair in a heterozygote are fully expressed. As a result, the phenotype of the offspring is a combination of the phenotype of the parents. Thus, the trait is neither dominant nor recessive.

Detailed explanation-2: -Alleles IA and IB for ABO blood type are neither dominant nor recessive to one another. Instead, they are codominant to each other. Codominance occurs when two alleles for a gene are expressed equally in the phenotype of heterozygotes.

Detailed explanation-3: -Codominance. Codominance refers to the dominance in which the two alleles or traits of the genotypes (of both homozygotes) are expressed together in offspring (phenotype). There is neither a dominant nor recessive allele in cross-breeding.

Detailed explanation-4: -In complete dominance, only one allele in the genotype is seen in the phenotype. In codominance, both alleles in the genotype are seen in the phenotype. In incomplete dominance, a mixture of the alleles in the genotype is seen in the phenotype.