Professor Menzel is lecturing about early development in the womb. He tells the class that _____ have Wolffian ducts.
A) Only fetuses with XX chromosomes.
B) Only fetuses with XY chromosomes
C) both male and female fetuses until the SRY gene is activated
D) both male and female fetuses until after the child is born

Question

Quizplus · Accepted Answer

Both male and female fetuses initially have Wolffian ducts, but the presence of the SRY gene on the Y chromosome in male fetuses triggers the development of the testes, which then secrete hormones that cause the Wolffian ducts to turn into male reproductive organs. Female fetuses, without the presence of the SRY gene, will develop female reproductive organs from their Müllerian ducts.

Professor Menzel Is Lecturing About Early Development in the Womb