Question

which kind of allele results in the trait indicated by the green color being expressed in the individuals shown here?
recessive
x - linked dominant
x - linked recessive
dominant

Explanation:

• A dominant allele is one that is expressed when present in either a homozygous (e.g., \(WW\)) or heterozygous (e.g., \(Ww\)) state.
• In the given pedigree, the green - colored individuals have the genotype \(Ww\). Since the trait is expressed in the heterozygous condition (\(Ww\)), the allele \(W\) (associated with the green color) must be dominant.
• A recessive allele would only be expressed in the homozygous recessive state (e.g., \(ww\)). X - linked (both dominant and recessive) would show a sex - linked pattern of inheritance (different expression in males and females based on X - chromosome inheritance), which is not indicated here as there is no information about sex - specific inheritance patterns related to X - chromosome.

Answer:

dominant