Question

What can be concluded about the mode of inheritance for the trait of spotted skin color in these aliens based on the observation that offspring consistently exhibit both purple and blue spotted skin?

a) Incomplete Dominance

b) Codominance

c) Polygenic Inheritance

d) Autosomal Recessive Inheritance

Answer 1

The mode of inheritance for the trait of spotted skin color that shows both purple and blue spots is likely codominance, as both alleles are expressed equally in the progeny.

Step-by-step explanation:

Based on the observation that offspring consistently exhibit both purple and blue spotted skin color, we can conclude that the mode of inheritance for this trait is likely codominance. In codominance, both alleles for a given gene are expressed simultaneously in a heterozygote without blending, leading to a phenotype that displays both characteristics. This is in contrast to incomplete dominance, where the heterozygote expresses an intermediate phenotype between the two homozygous phenotypes. In codominance, both alleles for the trait are expressed equally in the phenotype of the offspring. This means that the offspring will exhibit both purple and blue spots on their skin.