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 maternally inherited.
B. L is dominant to S.
C. The gene for large size is a sex-linked gene.
D. L is not dominant to S.
E. The gene for large size is a maternal effect gene and L is dominant to S.
Answer: A
You might also like to view...
In many ways, ________ as a biofuel compares very favorably to ethanol and other fuels.
Fill in the blank(s) with the appropriate word(s).
____ are most responsible for the symptoms of inflammation
a. Cytotoxic T cells b. Macrophages c. Mast cells d. Neutrophils e. Eosinophils
57. Eukaryotic cells are 10–100 times the size of prokaryotic cells. How do eukaryotic cells resolve the surface-area-to-volume limitations that favor smaller cells?
A. They have pumps that move gases and nutrients through the cell. B. None of the biochemical reactions in prokaryotes occur in eukaryotes. C. Organelles keep reactions compartmentalized and concentrated. D. Gases are taken up by active transport. E. They have membrane folding similar to some prokaryotes.
Changes in blood pH are detected by sensory receptors called _________
Fill in the blank(s) with correct word