Question

in wrens, feather color inheritance is an example of incomplete dominance, so b represents black feathers, and w represents white feathers. if a wren with genotype ww is mated with a wren with genotype bb, what is the likelihood that their offspring will have grey feathers?
100%
75%
25%
50%

Explanation:

Step1: Determine gametes

The wren with genotype \(WW\) can only produce gametes \(W\). The wren with genotype \(BB\) can only produce gametes \(B\).

Step2: Create Punnett square

The Punnett square for \(WW\times BB\) is:

	\(B\)	\(B\)
\(W\)	\(WB\)	\(WB\)

Since \(WB\) (heterozygous) shows grey feathers (due to incomplete dominance where neither \(B\) (black) nor \(W\) (white) is fully dominant, and the heterozygote is an intermediate - grey). All offspring (\(100\%\)) have the \(WB\) genotype.

Answer:

100%