Question

in a species of birds, brown feather color is dominant over white feather color. a homozygous dominant (bb) female mates with a homozygous recessive (bb) male. what percentage of offspring is expected to have brown feathers?

Explanation:

Step1: Determine the genotypes of parents

The female is homozygous dominant \( BB \), and the male is homozygous recessive \( bb \).

Step2: Use Punnett square or genetic cross rules

When \( BB \times bb \), all offspring will have the genotype \( Bb \). Since brown ( \( B \) ) is dominant over white ( \( b \) ), the \( Bb \) genotype will express the brown - feather phenotype.

Answer:

D. 100%