You may remember that the white mutant was the first mutant identified by Thomas Hunt Morgan. White protein encodes a transporter that is required to transport the red pigment molecules to the surface of the eye. When the white gene is reduced or lacking in its expression pigment that is made cannot be (effectively) transported to the surface resulting in lighter eye colors, or a white eye color when there is no protein function. The ey¬-Gal4 line will drive the expression of Gal4 until mid to late 3rd instar, but the red pigment is not deposited on the eye until late pupal development. What do you predict will be the eye color in young adult flies from this cross? Will it stay the same or be different after one week? Why?
Since the colour transport begins after 3rd instar that is in the pupal stage, the adult flies that comes after pupal stage will have red pigment deposited. It will increase in colour thickness after pupal stage from white to red in adult flies. It will enhance the colour after 1 week
You may remember that the white mutant was the first mutant identified by Thomas Hunt Morgan....