Ok......In sex-linked inheritance, the gene responsible for the disease is located on the X chromosome. Usually, the abnormal gene is recessive. For these reasons, the resultant disorder is called an X-linked recessive disease.
In a woman with such a defective gene, the effects of the abnormal gene are masked by those of the normal gene on the other X chromosome.
Although she does not have the disease herself, she is a carrier, capable of transmitting the defective gene to her children.
In X-linked recessive disease, the Y chromosome lacks the corresponding normal gene to mask the harmful effects of the abnormal gene on the X chromosome.
Thus, all male offspring of a woman who is a carrier of an X-linked recessive disease have a 50 percent chance of having the condition. All female offspring have a 50 percent chance of being carriers.
I hope this helps