Which of the following occurs to promote sexual differentiation during embryonic

Question

Which of the following occurs to promote sexual differentiation during embryonic development? View Available Hint(s) A signal from the Y chromosome instructs the gonads to develop into testes. A signal from the Y chromosome instructs the gonads to develop into testes, while a signal from the X chromosome instructs the gonads to develop into ovaries. A signal from the X chromosome instructs the gonads to develop into ovaries. A signal from the X chromosome instructs the gonads to become testes Submit Which of the following hormones plays a role in sexual differentiation and the development of the phenotypic sex? View Available Hint(s) The presence of testosterone causes the Wolffian ducts to differentiate into male reproductive structures. The presence of Müllerian inhibiting substance causes the Müllerian ducts to regress and not contribute to the development of female reproductive structures. The presence of Müllerian inhibiting substance causes the Wolfian ducts to differentiate into male reproductive structures. The presence of estrogen causes the Müllerian ducts to differentiate into female reproductive structures Submit ovide Feedback Part A What is the role of estrogen in the embryonic development of female genitalia? View Available Hint(s) Estrogen does not play a role in the embryonic development of female genitalia The presence of estrogen causes the Müllerian ducts to differentiate into female reproductive structures. The presence of estrogen causes the gonads to differentiate into ovaries The presence of estrogen causes the Wolfian ducts to regress and allows the Müllerian ducts to differentiate into female reproductive structures. Submit

Explanation / Answer

1. A signal from Y chromosome instructs the gonads to develop into testes.

The Y chromosome inhibits the development of mullerian duct and promotes the formation of Wolfian duct in the presence of signalling. This leads to develop male characters.

2. The presence of testerone causes wolfian duct to differentiate into male reproductive structures.

basically, two things work for differentiation. Presence or absence of MIH and testosterone. In male both are present, MIH causes regression of mullerian duct and testosterone causes differentiation of wolfian duct. While noth are absent in females. Thus mullerian duct differentiate. There occurs no role of estrogen.

3. Estrogen does not play a role in the embryonic development of female genitalia.

It is the absence of male hormones that lead to development of female structure and not the mere presence of oestrogen.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.