When Thomas Hunt Morgan crossed his red-eyed F₁ generation flies to each other,the F₂ generation included both red- and white-eyed flies.Remarkably,all the white-eyed flies were male.What was the explanation for this result?

A)The gene involved is on the Y chromosome.
B)The gene involved is on the X chromosome.
C)The gene involved is on an autosome, but only in males.
D)Other male-specific factors influence eye colour in flies.
E)Other female-specific factors influence eye colour in flies.