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?

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.

ok

explanation: