Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892



Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

In the development of the female sex organs:

a. all ducts in the 7-week embryo become Wolffian ducts.

b. the SRY gene is activated.

c. anti-Müllerian hormone is secreted.

d. the Müllerian ducts develop into oviducts.

e. the mother secretes oxytocin.

Summary Introduction


The development of sex organs, male or female, depends on the presence or absence of Y-chromosome. The develop of gonads begin in the 4th week of gestation. By the 7th week of gestation, the gonads have structures, which are common in both male and female embryo. The gonads are bipotential and can develop into a male or female gonad. This is decided by the presence of the Y-chromosome.


Justification/explanation for the correct answer:

Option (d) states that the Mullerian ducts develop into oviducts. When the fetus lacks the Y-chromosome, the bipotential gonad and internal ducts develop into female gonads. The absence of Y-chromosome results in the absence of SRY protein, which is the sex-determining region of the Y-chromosome. The presence of progesterone and estrogen secreted by the placenta helps in the development of ovaries. The Mullerian duct then forms oviduct, parts of the vagina, and uterus. The external female genitalia development is stimulated by the female sex hormones. Hence, option (d) is correct.

Explanation for the incorrect answers:

Option (a) states that all ducts in 7th week embryo become Wolffian ducts. The Wolffian ducts are formed only in the presence of testosterone. These hormones are secreted only in male embryos...

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Additional Science Solutions

Find more solutions based on key concepts

Show solutions add

What distinguishes an element from a compound? Can a compound also be an element?

General Chemistry - Standalone book (MindTap Course List)

What is the difference between our Solar System, our galaxy, and the Universe?

Horizons: Exploring the Universe (MindTap Course List)

Under certain circumstances, amino acids can be converted to glucose and so serve the energy needs of the brain...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

Explain the difference between geometric and structural isomers of alkenes.

Chemistry for Today: General, Organic, and Biochemistry

__________ consists of nucleotides. a. Ribose b. RNA c. DNA d. b and c

Biology: The Unity and Diversity of Life (MindTap Course List)

A uniformly charged ring of radius 10.0 cm has a total charge of 75.0 C. Find the electric field on the axis of...

Physics for Scientists and Engineers, Technology Update (No access codes included)

What happens in convergence zones? How is caballing associated with convergence zones?

Oceanography: An Invitation To Marine Science, Loose-leaf Versin