Human Physiology: An Integrated Approach (8th Edition)
8th Edition
ISBN: 9780134605197
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Chapter 26, Problem 17RQ
Summary Introduction
To determine: The mechanism of development of Down’s syndrome.
Introduction: A genetic disorder is an alteration in the genetic composition of the individual for one or more genes that are manifested in the form of altered protein sequence for that particular trait. The genetic disorder is
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Chapter 26 Solutions
Human Physiology: An Integrated Approach (8th Edition)
Ch. 26.1 - Name the male and female gonads and gametes.Ch. 26.1 - Where in a target cell would you expect to find...Ch. 26.1 - Prob. 3CCCh. 26.1 - Which sex will a zygote become if it inherits only...Ch. 26.1 - If the testes are removed from an early male...Ch. 26.2 - The gametes in a newborn male are at what stage of...Ch. 26.2 - Compare the amount of DNA in the first polar body...Ch. 26.2 - How many gametes are formed from one primary...Ch. 26.2 - Prob. 9CCCh. 26.2 - Prob. 10CC
Ch. 26.2 - Prob. 11CCCh. 26.3 - What do Sertoli cells secrete? What do...Ch. 26.3 - Prob. 13CCCh. 26.3 - Which cells of the testes have receptors for FSH?...Ch. 26.3 - Prob. 15CCCh. 26.4 - Name the phases of the ovarian cycle and the...Ch. 26.4 - Prob. 17CCCh. 26.4 - Prob. 18CCCh. 26.4 - On what day of the menstrual cycle will a woman...Ch. 26 - Match each of the following items with all the...Ch. 26 - The Y chromosome contains a region for male sex...Ch. 26 - List the functions of the gonads. How do the...Ch. 26 - Define each of the following terms and describe...Ch. 26 - Trace the anatomical routes to the external...Ch. 26 - Prob. 6RQCh. 26 - Prob. 7RQCh. 26 - List and give a specific example of the various...Ch. 26 - Prob. 9RQCh. 26 - Prob. 10RQCh. 26 - Diagram the menstrual cycle, distinguishing...Ch. 26 - Prob. 12RQCh. 26 - Define and relate each of the following terms in...Ch. 26 - Compare the actions of each of the following...Ch. 26 - Prob. 15RQCh. 26 - Discuss the roles of each of the following...Ch. 26 - Prob. 17RQCh. 26 - Prob. 18RQCh. 26 - An XY individual inherits a mutation that results...Ch. 26 - Prob. 20RQCh. 26 - The following graph shows the results of an...
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- Fertilization is the fusion of haploid gametes, ovum and spermatozoon, to form a diploid zygote. Discuss physiologic mechanisms in the male and the female that make sure that indeed only one sperm fertilizes a single eggarrow_forwardIf a human gamete with an extra chromosome participates in fertilization with a gamete with a normal number of chromosomes, how many chromosomes will the zygote have? Explain your answer. (Remember, zygotes are diploid)arrow_forwardDiscuss the human life cycle and the purpose of meiosis. (please keep it short) 4 - 5 senttencearrow_forward
- In a possible future scenario, male fertility drops to zero, but, luckily, scientists develop a way for women to pro-duce babies by virgin birth. Meiocytes are converted di-rectly (without undergoing meiosis) into zygotes, which implant in the usual way. What would be the short- andlong-term effects in such a society?arrow_forwardWhich is/are true concerning chromosomal sex determination? a. Anyone born with two x chromosomes is a male b. Sperm always contain Y chromosomes c. Testis Determining Factor is produced by the SRY allele present on the Y chromosome d. Under normal circumstances, a human embryo that has both and X and a Y chromosome is male.arrow_forwardMeiosis involves two phases, meiosis I and meiosis II. This type of cell division occurs during the formation of both sperm and ovum. The first meiotic division of the primary spermatocyte results in two secondary spermatocytes. .What is the result of the first meiotic division of the primary oocyte? two secondary oocytes two polar bodies O two ovum one secondary oocyte and one polar bodyarrow_forward
- What is double fertilization? Include the fate of the resulting zygote and triploid nucleus in your answer.arrow_forwardTurner syndrome occurs when an individual inherits one X chromosome but lacks a second sex chromosome. A phenotypically normal woman, whose father was color-blind, and color-blind man have child with Turner syndrome who is color blind. In which process did the nondisjunction occur that gave rise to Turner syndrome in the child? oogenesis or spermatogenesis spermatogenesis oogenesisarrow_forwardMost cells in a sexually reproducing organism have two sets of chromosomes. Explain this observation and describe its significance to meiosis.arrow_forward
- Oogenesis is the process of female gamete (ovum or egg) production in animals. Spermatogenesis is the process of male gamete (sperm) production in animals. Although both processes produce gamete(s), there are distinct similarities and differences between the two. Compare and contrast oogenesis to spermatogenesis by drawing a diagram showing the two processes. In your hand-drawn diagrams, be sure to include when the processes of mitosis, meiosis I and meiosis II are occurring identify each germ cell structure and its ploidy highlight 4 differences between the two processesarrow_forwardIn human spermatogenesis, mitosis of a stem cell gives rise to one cell that remains a stem cell and one cell that becomes a spermatogonium. Draw four rounds of mitosis for a stem cell and label; the daughter cells. For one spermatogonium, draw the cells it would produce from one round of mitosis followed by meiosis. Label the cells, and label mitosis and meiosis. What would happen if stem cells divided like spermatogonia?arrow_forwardIf a human gamete with a missing chromosome participates in fertilization with a gamete with a normal number of chromosomes, how many chromosomes will the zygote have? Will the zygote be viable? Explain your answer. (Remember, zygotes are diploid)arrow_forward
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