Is it easier to analyze genotype by observing phenotype in organisms with complete dominance or in organisms with incomplete dominance?

Answer 1

It is easier to analyze genotype by observing phenotype in organisms with incomplete dominance (also known as codominance), because in incomplete dominance the individual will show a specific phenotype for each situation, whether it is homozygous dominant, heterozygous, or homozygous recessive. For example, in flowers, such as the ones that Mendel studied, a homozygous dominant flower will be red, a homozygous recessive flower will be white, and a heterozygous flower will be pink.

In complete dominance, a heterozygous will only express the dominant phenotype, as opposed to incomplete dominance, in which a heterozygous individual will express a phenotype that is representative of both of the dominant and recessive traits. Because heterozygous individuals in complete dominance express the dominant phenotype, it is hard to determine whether the genotype is homozygous dominant or heterozygous for the trait.

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Answer 2

It is generally easier to analyze genotype by observing phenotype in organisms with complete dominance because the phenotypic expression directly reflects the genotype. In contrast, with incomplete dominance, the phenotype is an intermediate between the two homozygous genotypes, making it more challenging to accurately determine the genotype solely based on the phenotype.