An individual has a karyotype that is XX but is phenotypically male.What could explain this result?
A) The Y chromosome was not visible in the karyotype.
B) Sex is determined by the autosomes and not the X chromosomes.
C) A translocation has occurred, placing the SRY gene on one of the X chromosomes.
D) The DAX 1 protein is overproduced.
E) A nondisjunction event has resulted in Klinefelter syndrome.

Question

Quizplus · Accepted Answer

The SRY gene is necessary for male sexual development and is typically found on the Y chromosome. However, a translocation between the Y chromosome and one of the X chromosomes can result in the SRY gene being placed on an X chromosome, leading to male development despite having two X chromosomes.

An Individual Has a Karyotype That Is XX but Is