Which statement concerning sex differentiation is INCORRECT?
A) A Y chromosome stimulates production of H-Y antigen by primitive gonadal cells.
B) Ovaries must be present for feminization of the reproductive tract and external genitalia to occur.
C) Secretion of testosterone and Müllerian-inhibiting factor by the fetal testes induces development of the reproductive tract and external genitalia along male lines.
D) Early in development, embryos of both sexes have the same indifferent reproductive tissues capable of differentiating into either a male or female reproductive system depending respectively on the presence or absence of masculinizing factors.

Question

Quizplus · Accepted Answer

It is incorrect to say that ovaries must be present for feminization of the reproductive tract and external genitalia to occur. In fact, the absence of testes (and therefore testosterone and Müllerian-inhibiting factor) is enough for feminization to occur. In other words, in the absence of masculinizing factors, the default pathway is female development.

Which Statement Concerning Sex Differentiation Is INCORRECT