You Are Trying to Improve Growth in an Economically Important

Multiple Choice

You are trying to improve growth in an economically important fish species.These fish have a gene that controls their size.There are two size alleles;L and S.You cross a large female (LL) with a small male (SS) and get all large fish! The genotypes of the F₁ are 100% LS so you assume that large size is dominant to small.You then cross a small female (SS) with a large male (LL) and get all small fish! The genotypes of this F₁ are all LS.How do you explain this result?

A) The gene for large size is a maternal effect gene.
B) L is not dominant to S.
C) The gene for large size is a sex-linked gene.
D) L is dominant to S.
E) The gene for large size is a maternal effect gene and L is dominant to S.