Question

The pattern of inheritance of white eye colour in Drosophila shows that the gene is ______.

Options

• located at the X-chromosomes

• located on the Y-chromosomes

• located on an autosome

• sex-linked

Answer 1

The pattern of inheritance of white eye colour in Drosophila shows that the gene is located at the X-chromosomes.

Explanation:

In Drosophila, white eye color is a sex-linked recessive trait. This means that females (XX) can carry the white eye gene without expressing it if they also have the dominant red eye gene. However, males (XY) only have one X chromosome, so if they inherit the white eye gene, they will express it. This pattern of inheritance is characteristic of genes located on the X chromosome.