Which of the following is caused by a gene on the X chromosome?

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Color blindness is caused by a gene on the X chromosome. The gene is recessive and more common in males because they only have one X chromosome. Females can also inherit color blindness if they inherit the recessive gene from both parents. Tay-Sachs disease is caused by a gene on chromosome 15, PKU is caused by a gene on chromosome 12, and sickle-cell disease is caused by a gene on chromosome 11.

Which of the Following Is Caused by a Gene on the X