What Is Xeroderma Pigmentosum?
2. Causes
Xeroderma pigmentosum is passed down to the patient from their parents. There are eight varieties of the disorder, each of which is caused by mutations in a different gene. 7 of these are recessive conditions, meaning that both of the patient’s parents had the faulty gene. The parents would not have had the disorder themselves, however.
The other type is an autosomal dominant condition, which means that only one of the patient’s parents had the gene. In addition, the parent with the gene would also have had the disorder. Sensitivity to sunlight is a symptom regardless of which variety of the disorder a person has.
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