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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inhibition of follicular development and suppression of ovulation
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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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- Figure 18.17 Which of the following statements about hormone regulation of the female reproductive cycle is false? a. LH and FSH are produced in the pituitary, and estrogen and progesterone are produced in the ovaries. b. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken. c. Both progesterone and estrogen are produced by the follicles. d. Secretion of GnRH by the hypothalamus is inhibited by low levels of estrogen but stimulated by high levels of estrogen.arrow_forwardFigure 43.15 Which of the following statements about hormone regulation of the female reproductive cycle is false? LH and FSH are produced in the pituitary, and estradiol and progesterone are produced in the ovaries. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken. Both progesterone and estradiol are produced by the follicles. Secretion of GnRH by the hypothalamus is inhibited by low levels of estradiol but stimulated by high levels of estradiol.arrow_forwardWhat is the function of each part of the diagram?Male Reproductive System: What two phases of a person's life do testosterone determine "male" development? Consider both gonadal and brain development, as outlined in the slides, as well as secondary sex characteristics. What does this imply about gender identity later in life? Female Reproductive System:Label this diagram. What is the function of each part of the diagram? Explain IN DETAIL how the following figure describes one month in a woman's life between puberty and menopause. What is happening day by day? What happens at puberty to get it started and what happens at menopause to end it?arrow_forward
- Which of these functions explains the role of hormones in the reproductive systems? A. Influence female sex traits B. Regulates body temperature. C. Controls the calcium level in the blood. D. Enables the body to produce more antibodies 4. Which of these reproductive parts explains the role of progesterone in the onset of puberty? A. Penis B. Uterine lining C. Oviduct D. Hypothalamusarrow_forwardWhich of the following is a major difference between spermatogenesis and oogenesis? a. Spermatogenesis involves meiosis, and oogenesis involves mitosis. b. Spermatogenesis is continuous, but oogenesis is variable. c. Spermatogenesis produces fewer gametes per precursor cell than oogenesis. d. All of these are significant differences between oogenesis and spermatogenesis.arrow_forwardRemoval of gonads cannot be considered as a contraceptive option. Why?arrow_forward
- Which of the following statements does NOT describe the role of luteinizing hormone (LH) in the female reproductive system? a. Stimulates the production of progesterone b. Stimulates the development of the corpus luteum c. Suppresses the production of estrogen d. Causes the release of mature ovum from ovaryarrow_forwardWhich of the following statements does NOT describe the role of progesterone in the female reproductive system? a. Triggers the release of the ovum b. Prevents smooth muscle contraction, thereby preventing premature birth c. Prevents the shedding of the endometrium d. Ensures that the endometrium is thick enough to support a fetilized eggarrow_forwardWhich of the following statements is incorrect? a) Sperm occur as X- or Y-chromosome bearing gametes b) The sex of an individual can not be determined from morphology early in embryonic development c) It is the ovum which determines the sex of the newly developing embryo d) X-chromosome bearing sperm are slightly larger than Y-chromosome bearing spermarrow_forward
- Which of these has the largest amount of DNA? a. Spermatogonial cells b. Primary spermatocyte c. Secondary spermmatocyte d. Sertoli cells e. First polar bodyarrow_forwardWhich of the following processes takes place simultaneously during the menstrual cycle? a) High LH levels and ovulation b) Reconstruction of the corpus luteum and increased release of progesterone from the ovaries c) Maximum LH release and menstruation (bleeding) d) Early follicular development and uterine lining e) Ovulation and menstruationarrow_forwardIs this true or false? a. Fertilization is followed by a cleavage, a period of rapid cell division without growth. b. From the process above, this results in the production of a large number of cells called blastomeres. c. In sexual reproduction, the offspring have the same combinations of genes as their parents. d. Sequential hermaphroditism occurs when an animal is one sex during one phase of its lifecycle and the opposite sex during another phasearrow_forward
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