Self Assessment Question # 4
for Lesson 12


by Dr Jamie Love © 2002 - 2010
Genetics Course


(True story.)
A veterinarian was presented with a calico cat. You may recall that the calico pattern of these cats is caused by the mosaic X inactivation patterns for genes involved in coat color. To the vet's surprise, the cat was a "tom" (a male cat)!

Is that normal?

How could that happen?

Hint - the vet solved the mystery by checking the cat's karyotype. What do you think was discovered about this cat's chromosomes?


Go to the ANSWER