Position-effect variegation of red and white eye color in Drosophila produces
A)one red eye and one white eyes.
B)two red or two white eyes depending on which gene is dominant.
C)eyes alternating red and white eye facets.
D)eyes with red and white patches of varying sizes and positions.

Question

Quizplus · Accepted Answer

Position-effect variegation in Drosophila results from the movement of a gene near heterochromatin, leading to variable silencing of the gene in different cells. This causes patches of cells to express the gene differently, resulting in eyes with red and white patches of varying sizes and positions.

Position-Effect Variegation of Red and White Eye Color in Drosophila