How do sex linked disorders occur
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Sex-linked diseases are passed down through families through one of the X or Y chromosomes. X and Y are sex chromosomes. Dominant inheritance occurs when an abnormal gene from one parent causes disease, even though the matching gene from the other parent is normal. The abnormal gene dominates. But in recessive inheritance, both matching genes must be abnormal to cause disease.
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X chromosomes key to sex differences in health
Compulsive sexual behavior - Symptoms and causes - Mayo Clinic
X-linked dominant inheritance , sometimes referred to as X-linked dominance , is a mode of genetic inheritance by which a dominant gene is carried on the X chromosome. As an inheritance pattern, it is less common than the X-linked recessive type. In medicine, X-linked dominant inheritance indicates that a gene responsible for a genetic disorder is located on the X chromosome, and only one copy of the allele is sufficient to cause the disorder when inherited from a parent who has the disorder. In this case, someone who expresses an X-linked dominant allele will exhibit the disorder and be considered affected. X-linked dominant traits do not necessarily affect males more than females unlike X-linked recessive traits. The exact pattern of inheritance varies, depending on whether the father or the mother has the trait of interest. All fathers that are affected by an X-linked dominant disorder will have affected daughters but not affected sons.
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Sex-Linked Traits and Disorders
Albinism is an inherited condition in which a person lacks the usual amount of the pigment melanin, which is the substance that gives color to skin, hair, and eyes. Melanin is the main substance that determines a person's skin, hair, and eye color. In the United States, albinism affects approximately 1 in 17, people. They are inherited from a person's parents and are contained in the chromosomes found in the cells of the body. The outward signs of albinism vary depending on the amount of pigment a person has, and many people with albinism have skin much lighter than that of their family members.
Genetic disorders are precisely what they sound like: Diseases caused by a mutation of a gene. When such diseases are inherited rather than the result of a random mutation , it means they are passed along to a child from one or both parents according to a specific patterns of inheritance. These patterns are determined by the gene involved, whether only one or both parents have the gene, which chromosome it is on, and other factors.