Hemophilia is caused by a __________ gene on the __________ chromosome.
A) dominant; X
B) recessive; X
C) dominant; Y
D) recessive; Y
E) heterozygous; Y

Question

Quizplus · Accepted Answer

Hemophilia is caused by a recessive gene located on the X chromosome. Since males have only one X chromosome, a single recessive gene on their X chromosome will result in the disease. Females, having two X chromosomes, must have the gene on both chromosomes to exhibit the disease, making it much rarer in females.

Hemophilia Is Caused by a __________ Gene on the __________

Hemophilia Is Caused by a Gene on the