Question

Under what condition might a human female have the XY sex chromosome complement?

A) This female would have one complete X chromosome and a Y chromosome that lacks SRY.
B) She has an XX chromosome and a Y chromosome.
C) The X chromosome has a mutation such that it is able to overpower the Y chromosome.
D) The Y chromosome has an active Xist gene on it.
E) This is not possible.

Answer 1

A human female might have an XY sex chromosome complement if she has a complete X chromosome and a Y chromosome that lacks the SRY gene, allowing her to develop female characteristics.

Step-by-step explanation:

Under what condition might a human female have the XY sex chromosome complement? The most accurate answer is A) This female would have one complete X chromosome and a Y chromosome that lacks SRY. The SRY gene on the Y chromosome is responsible for initiating the development of male physical characteristics. Without a functional SRY gene, even with a Y chromosome present, an embryo will develop female characteristics. The human male typically has XY chromosomes, and the human female has XX chromosomes. Errors in meiosis can give rise to abnormalities like an individual with an XY complement presenting as a female, which would be due to the lack of a functional SRY gene.