Final answer:
5-alpha reductase deficiency is a genetic condition causing sterility due to a hormone deficiency affecting male genital development.
Explanation:
5-alpha reductase deficiency is a congenital defect that causes sterility in individuals. This condition results from inheriting two nonfunctional copies of the SRD5A2 gene, leading to the lack of a hormone crucial for male genital development in infancy. The affected individuals often display female genitalia at birth, but puberty triggers the development of male characteristics.
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