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What is the definition of autosomal gene disorder,Recessive allele carrier and Sex-linked disorder?

Biology
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What is the definition of autosomal gene disorder,Recessive allele carrier and Sex-linked disorder?

Feb 2nd, 2015

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. If only one gene in the pair is abnormal, the disease does not occur or it is mild. Someone who has one abnormal gene (but no symptoms) is called a carrier. Carriers can pass abnormal genes to their children.

The term "sex-linked recessive" usually refers to X-linked recessive.


Feb 2nd, 2015

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