AP BIOLOGY

Detailed explanation-1: -The offspring’s phenotype is an intermediate of the parents’ homozygous traits. The phenotypic expression of homozygous in codominance is independent. The expression of alleles in incomplete dominance is conspicuous, meaning none of the alleles dominates over the other.

Detailed explanation-2: -Incomplete dominance is when the phenotypes of the two parents blend together to create a new phenotype for their offspring. An example is a white flower and a red flower producing pink flowers. Codominance is when the two parent phenotypes are expressed together in the offspring.

Detailed explanation-3: -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.

Detailed explanation-4: -In both incomplete dominance and codominance, both phenotypic and genotypic ratios are identical 1:2:1 in F2 generation. In incomplete dominance, the phenotype of hybrid is intermediate between the two parents as both the alleles express themselves partially.

Detailed explanation-5: -In codominance, neither phenotype is completely dominant. This phenomenon is commonly seen in ABO blood group system. When any other blood group (A, B or AB) is crossed with O blood group, then the phenotypic ratio is obtained as 1:1. Both the genes are equally expressed.