A male pseudohermaphrodite can result from a deficiency in ___ that masculinizes the external genitalia.

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A male pseudohermaphrodite is a condition in which an individual has a female reproductive tract but develops male external genitalia. This can result from a deficiency in 5-alpha reductase, an enzyme that converts testosterone to dihydrotestosterone (DHT). DHT is responsible for masculinizing the external genitalia during fetal development. Without 5-alpha reductase activity, the fetus will have female internal genitalia but male external genitalia, leading to a male pseudohermaphrodite. A deficiency in 17-beta reductase would actually result in feminization of the external genitalia, and aromatase and estradiol are not directly involved in the development of male external genitalia.

A Male Pseudohermaphrodite Can Result from a Deficiency in ___