Multiple choice

Which one of the following is a sex-linked disease?

  1. Beri beri

  2. Tylosis

  3. Albinism

  4. Colour blindness

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Color blindness (specifically red-green color blindness) is a sex-linked trait carried on the X chromosome. Males (XY) are more frequently affected because they have only one X chromosome. Beri beri is a vitamin deficiency, tylosis is an autosomal dominant condition affecting esophagus skin, and albinism is an autosomal recessive trait - none of these are sex-linked.