The key principle demonstrated by Turner's syndrome is that
A) male fetuses produce Müllerian-inhibiting substances.
B) female secondary sexual characteristics appear without the ovaries.
C) ovaries are necessary for development of the Müllerian system.
D) different hormones are required to develop or to suppress the development of the male reproductive organs.
E) ovaries are NOT necessary for development of the Müllerian system.

Question

Quizplus · Accepted Answer

Turner syndrome is a genetic disorder in females caused by the absence of all or a part of one X chromosome, leading to various physical and developmental abnormalities. One of the hallmarks of Turner syndrome is the underdeveloped or absent ovaries, leading to infertility. However, the female reproductive ducts, including the Müllerian system, develop normally without the ovaries, demonstrating that ovaries are not necessary for the development of the Müllerian system. Therefore, the correct answer is E: ovaries are NOT necessary for the development of the Müllerian system.

The Key Principle Demonstrated by Turner's Syndrome Is That