In mussels, brown coloring (B) is dominant and blue coloring (b) is recessive. A homozygous brown mussel crosses with a blue mussel. What percentage of offspring are expected to be blue?

0%

All of them will have a genotype of Bb, so none of them will be expected to be blue

A homozygous brown mussel crosses with a blue mussel. The percentage of offspring are expected to be blue 0%

Explanation:

homozygous brown means BB = which is dominant

while the blue mussel too is bb = homozygous blue recessive

After crossing, it would result into having Bb, Bb, Bb, Bb which are all heterozygous dominant brown which is 100% brown because the colour brown is dominant over the blue colour.