A horse has 64 chromosomes and a donkey has 62. Using your knowledge of meiosis, explain why a cross between a horse and a donkey produces a mule, which usually is sterile.

Question

Edith

Biology

6 March, 06:34

A horse has 64 chromosomes and a donkey has 62. Using your knowledge of meiosis, explain why a cross between a horse and a donkey produces a mule, which usually is sterile.

+2

Answers (1)

Know the Answer?

Julius Weeks · Answer 1

Ok, so when a horse (with 64 chromosomes) is crossed with a donkey (that has 62 chromosomes), each parent give its child half of its chromosomes. [64/2=32] [62/2=31]. So the mule gets 31 pairs of chromosomes plus 32 pairs of chromosomes. That equals 63 total chromosomes. In order to be a parent, it must give half of its chromosomes to its child. [63/2=31.5] You can't have half a chromosome, so the mule is a sterile organism. Let me know if you have questions.