Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN: 9781305251052
Author: Michael Cummings
Publisher: Cengage Learning
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Textbook Question
Chapter 7, Problem 8QP
How Is Sex Determined?
The absence of a Y chromosome in an early embryo causes the:
- a. embryonic testis to become an ovary
- b. Wolffian duct system to develop
- c. Müllerian duct system to degenerate
- d. indifferent gonad to become an ovary
- e. indifferent gonad to become a testis
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Which of the following is not a mechanism on how contraceptive pills work to prevent pregnancy?
A.
thinning the endometrium to prevent implantation
B.
inhibition of follicular development and suppression of ovulation
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progesterone inhibits the sperm from penetrating through the cervix and female upper tract by making the cervical mucus unfriendly
D.
stimulates the production of high testosterone levels
One day while walking across campus, you see a female butterfly laying fertilized eggs, as shown in the image:
1. What type of ovarioles would the adult female butterfly have (hint: remember the Order of butterflies)?
a. Panoistic ovarioles
b. Plasmatocytic ovarioles
c. Polytrophic ovarioles
d. Collaterial ovarioles
e. Telotrophic ovarioles
2. Which combination of mechanisms would the butterfly use to supply vitellogenins/maternal mRNAs to the developing oocytes?
a. Follicular epithelial cells/trophocytes contained within the follicle
b. Apical cells of germarium/nutritive cords
c. Follicular epithelial cells/nucleus of the oocyte
d. Prefollicular tissue in germarium/trophoocytes that remain in germarium
3. Which statement is correct with respect to the hormonal regulation of the development of the ovaries and vitellogenesis in the adult female butterfly? (Hint: the processes are the same as in a female mosquito.)
a.…
Which of the following is TRUE about the mechanism of sex determination?
A) The product of the SRY gene converts the bipotential gonads into testes.
B) The development of an ovary is conditioned by the presence of two X chromosomes.
(C) Testosterone promotes the degeneration of the Mullerian duct.
D.
The ovary produces a Wolffian inhibition factor that causes the Wolffian duct to degenerate.
E) The "feminization" of accessory sex orgarts is promoted by the ovary.
Chapter 7 Solutions
Human Heredity: Principles and Issues (MindTap Course List)
Ch. 7.6 - Prob. 1EGCh. 7.6 - Prob. 2EGCh. 7 - As outlined in this chapter, sex can be defined at...Ch. 7 - As outlined in this chapter, sex can be defined at...Ch. 7 - Prob. 1QPCh. 7 - The Human Reproductive System Discuss and compare...Ch. 7 - Prob. 3QPCh. 7 - A Survey of Human Development from Fertilization...Ch. 7 - Prob. 5QPCh. 7 - Prob. 6QP
Ch. 7 - Prob. 7QPCh. 7 - How Is Sex Determined? The absence of a Y...Ch. 7 - Prob. 9QPCh. 7 - Mutations Can Uncouple Chromosomal Sex from...Ch. 7 - Prob. 11QPCh. 7 - Mutations Can Uncouple chromosomal Sex from...Ch. 7 - Prob. 13QPCh. 7 - Sex-Influenced and Sex-Limited Traits What method...Ch. 7 - Prob. 15QPCh. 7 - Prob. 16QPCh. 7 - Equalizing the Expression of X Chromosome Genes in...Ch. 7 - Equalizing the Expression of X Chromosome Genes in...Ch. 7 - Equalizing the Expression of X Chromosome Genes in...
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