In cocker spaniels, black coat color (B) is dominant over red (b), and solid color (S) is dominant over...?

Question

spotted (s). If two dihybrids (Bb Ss) were crossed, the most common phenotype would be:

a. black and solid
b. black and spotted
c. red and solid
d. red and spotted
e. none of the above

thanks in advance.

Answer 1

A black and solid. The most common genotype will be the dihybrid.

Answer 2

black and solid
this is a typical dihybrid mendelian cross for F2 generation.
any genotype having at least 1 dominant each for black(B) and solid(S) will be phenotypically black and solid. in fact the ratio of black and solid to all the other offspings will be 9:16.
try the punnett square.