Question

In Drosophila, the gene for eye colour is present on the X chromosome. When a red-eyed female
was mated with a white-eyed male, a total of 100 progeny were obtained – 50 females and 50
males. Of the 50 females, 25 were red-eyed, and 25 were white-eyed. How many of the male
progeny were red-eyed?
(A) 0 (B) 10 (C) 20 (D) 25

Answer 1

25 maybe.................

Answer 2

Answer:

25 males will be containing red eyes.

Explanation:

In Drosophila eye color is an X-linked trait. Red color is dominant while white color is recessive. When a red-eyed female was mated with a white-eyed male, a total of 100 progeny were obtained – 50 females and 50 males. Of the 50 females, 25 were red-eyed, and 25 were white-eyed. 25 males will be red eyes. Only half male progeny will get red eyes due to X chromosome contribution from female parent and rest male will be white eyes in color.