Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 50, Problem 4TYU
Summary Introduction
Introduction: Reproductive system (or genital system) is involved in sexual reproduction. The male and female reproductive systems function to propagate the species. Gametogenesis is a process by which male and female gametes are produced. The spermatogenesis and oogenesis are the two types of gametogenesis present in the sexual reproduction of animals.
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. SCIENTIFIC INQUIRY You discover a new egg-laying wormspecies. You dissect four adults and find both oocytesand sperm in each. Cells outside the gonad contain fivechromosome pairs. Lacking genetic variants, explain howyou would determine whether the worms can self-fertilize.
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Chapter 50 Solutions
Biology (MindTap Course List)
Ch. 50.1 - Prob. 1LOCh. 50.1 - Distinguish among budding, fragmentation, and...Ch. 50.1 - Prob. 2CCh. 50.2 - Relate the structure of each organ of the human...Ch. 50.2 - Trace the passage of sperm cells through the human...Ch. 50.2 - Prob. 4LOCh. 50.2 - Prob. 1CCh. 50.2 - Prob. 2CCh. 50.2 - Prob. 3CCh. 50.2 - Prob. 4C
Ch. 50.3 - Prob. 5LOCh. 50.3 - Trace the development of a human egg and trace its...Ch. 50.3 - Describe the endocrine regulation of reproduction...Ch. 50.3 - Prob. 1CCh. 50.3 - Prob. 2CCh. 50.3 - Prob. 3CCh. 50.4 - Prob. 8LOCh. 50.4 - Prob. 1CCh. 50.4 - Prob. 2CCh. 50.4 - Which hormones most affect the birth process? What...Ch. 50.5 - Prob. 9LOCh. 50.5 - Prob. 1CCh. 50.6 - Prob. 10LOCh. 50.6 - Prob. 1CCh. 50.6 - Prob. 2CCh. 50.6 - Prob. 3CCh. 50.7 - Prob. 11LOCh. 50.7 - Prob. 1CCh. 50.7 - Prob. 2CCh. 50 - Hermaphroditism (a) is a form of asexual...Ch. 50 - Prob. 2TYUCh. 50 - Prob. 3TYUCh. 50 - Prob. 4TYUCh. 50 - Prob. 5TYUCh. 50 - Test Your Understanding 6 After ovulation, the...Ch. 50 - Prob. 7TYUCh. 50 - Prob. 8TYUCh. 50 - Prob. 9TYUCh. 50 - Test Your Understanding 10 Which sequence best...Ch. 50 - Prob. 11TYUCh. 50 - Test Your Understanding 12 INTERPRET DATA Examine...Ch. 50 - Test Your Understanding 13 EVOLUTION LINK Contrast...Ch. 50 - Prob. 14TYUCh. 50 - Test Your Understanding 15 SCIENCE, TECHNOLOGY,...Ch. 50 - Test Your Understanding 16 SCIENCE, TECHNOLOGY,...
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- Test Your Understanding 13 EVOLUTION LINK Contrast the biological advantages of hermaphroditism that involves cross-fertilization with hermaphroditism that involves self-fertilization.arrow_forwardTest Your Understanding 6 After ovulation, the secondary oocyte enters the (a) oviduct (b) corpus luteum (c) cervix (d) ovary (e) vaginaarrow_forwardIn questions 13 and 14, decide whether each is an example of sexual or asexual reproduction, and state why. 13. A diploid queen honeybee produces haploid eggs by meiosis. Some of these eggs are never fertilized and develop into haploid male honeybees (drones).arrow_forward
- A diploid nucleus at early mitotic prophase has __________ set(s) of chromosomes; a diploid nucleus at mitotic telophase has __________ set(s) of chromosomes. (a) 1; 1 (b) 1; 2 (c) 2; 2 (d) 2; 1 (e) not enough information has been givenarrow_forwardTest Your Understanding 10 Which sequence best describes the passage of sperm? 1. urethra 2. vas deferens 3. epididymis 4. ejaculatory duct 5. seminiferous tubules (a) 3, 1, 2, 4, 5 (b) 1, 3, 2, 4, 5 (c) 5, 3, 2, 4, 1 (d) 1, 3, 4, 2, 5 (e) 3, 1, 4, 2, 5arrow_forwardTest Your Understanding 12 INTERPRET DATA Examine Figure 50-14. Which hormones are present in largest concentration just before ovulation? During which part of the menstrual cycle is the endometrium most prepared to receive an embryo? Which hormones stimulate thickening of the endometrium? Gonadotropic hormones and ovarian hormones regulate the monthly sequence of events that take place within the ovary and uterus. The preovulatory phase begins with menstruation; the postovulatory phase begins after ovulation. Figure 50-14 Endocrine regulation of the menstrual cycle When fertilization does not occur, the menstrual cycle repeats about every 28 days. Note the changes in hormone concentrations that regulate the menstrual cycle. (FSH, follicle-stimulating hormone; LH, luteinizing hormone) PREDICT What happens when a. womans ovaries produce a very low amount of estrogen?arrow_forward
- Test Your Understanding 15 SCIENCE, TECHNOLOGY, AND SOCIETY Why do you think that a variety of effective methods of male contraception have not yet been developed? If you were a researcher, what are some approaches you might take to develop a method of male contraception?arrow_forwardDiscuss Concepts Developmental biologist Lewis Wolpert once observed that it is not birth, marriage or death, but gastrulation which is truly the most important time in your life. In what sense is he correct?arrow_forwardEmploying molecular genetics, epigenetics and developmental biology principles, elucidate how the over 200 cell types in humans originate from a single fertilized ovum.arrow_forward
- VISUAL SKILLS In this diagram, does the sperm cell that fertilizes the egg cell differ geneticallyfrom the egg? Explain.arrow_forwardGenetics knowledge 9. A certain species of desert rat is a sexually-reproducing, diploid animal. It has a genome (N) consisting of 22 different types of chromosomes. Stages of gametogenesis in these mammals are similar to humans. Answer the following question in the imagearrow_forwardTest Your Understanding 16 SCIENCE, TECHNOLOGY, AND SOCIETY The incidence of abortion has declined more in countries where abortions are legal (and safe) than in countries in which they are illegal (and unsafe). Can you suggest an explanation?arrow_forward
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