A pure dark gray bottlenose dolphin is crossed with a pure black bottlenose dolphin. All of the offspring are dark gray. What does that mean? (3a) Question 3 options:

A. The gene for black color is dominant over the gene for dark gray color.

B. Black is more common than dark gray.

C. Dark gray and black are equally expressed.

D. The gene for dark gray color is dominant over the gene for black color.