Question

a black swan and white swan breed and produce offspring that are gray in color. what is the most likely explanation for this happening? it is a mutation, and there is no scientific way to explain the appearance of the gray feathers. it could be a situation of codominance producing the gray feathers from black and white alleles. the alleles for white and black have incomplete dominance, and they blend producing gray feathers.

Explanation:

• Mutation: Unlikely as there is a scientific genetic explanation (incomplete dominance). Mutations are random and not the most likely here.
• Codominance: In codominance, both alleles are expressed simultaneously (e.g., spots of both colors). But gray is a blend, not simultaneous expression of black and white.
• Incomplete Dominance: When alleles show incomplete dominance, the heterozygous phenotype is a blend of the two homozygous phenotypes. Here, black (e.g., \(BB\)) and white (e.g., \(WW\)) could give \(BW\) (gray) if there is incomplete dominance.

Answer:

The alleles for white and black have incomplete dominance, and they blend producing gray feathers.