Essentials of Biology (5th International Edition)
5th Edition
ISBN: 9781259660269
Author: Sylvia S. Mader, Dr., Michael Windelspecht
Publisher: Mcgraw-Hill
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Chapter 9.4, Problem 1LO
Summary Introduction
To determine:
The term non disjunction and how it is responsible for the formation of abnormal chromosomal number.
Introduction:
Humans cell contain 46 chromosomes (2n) and these are diploid in nature but at the time of fertilization only 23 (n) chromosomes are received from mother and 23 (n) chromosomes are received from father to form a zygote by the process of meiosis.
Zygote is formed by the transfer of male gamete (sperm) and female gamete (ova). The ova and sperm are haploid (n) and form a diploid zygote (2n). Zygote receives 46 chromosomes. Some humans are born with abnormalities as they receive abnormal chromosomal number in their cell. Abnormal chromosome is formed when chromosome fails to separate during meiosis and is known as non-disjunction.
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Chapter 9 Solutions
Essentials of Biology (5th International Edition)
Ch. 9.1 - Explain the purpose of meiosisCh. 9.1 - Prob. 2LOCh. 9.1 - Prob. 3LOCh. 9.1 - Prob. 4LOCh. 9.1 - Prob. 1CYPCh. 9.1 - Prob. 2CYPCh. 9.1 - Prob. 3CYPCh. 9.1 - Prob. 4CYPCh. 9.1 - Prob. 1ACh. 9.1 - Prob. 2A
Ch. 9.2 - List the phases of meiosis, and briefly describe...Ch. 9.2 - Prob. 2LOCh. 9.2 - Prob. 1CYPCh. 9.2 - Prob. 2CYPCh. 9.2 - Prob. 3CYPCh. 9.2 - Prob. 3ACh. 9.2 - Prob. 4ACh. 9.2 - Prob. 5ACh. 9.2 - Prob. 6ACh. 9.2 - Prob. 7ACh. 9.2 - Prob. 8ACh. 9.2 - Prob. 9ACh. 9.2 - Prob. 10ACh. 9.2 - Prob. 11ACh. 9.3 - Contrast the events of meiosis I and meiosis II...Ch. 9.3 - Prob. 2LOCh. 9.3 - Prob. 1CYPCh. 9.3 - Prob. 2CYPCh. 9.3 - Summarize the major differences among the stages...Ch. 9.3 - Prob. 12ACh. 9.3 - Prob. 13ACh. 9.3 - Prob. 14ACh. 9.4 - Prob. 1LOCh. 9.4 - Prob. 2LOCh. 9.4 - Prob. 3LOCh. 9.4 - Describe how a zygote can receive an abnormal...Ch. 9.4 - Contrast monosomy with trisomy.Ch. 9.4 - Prob. 3CYPCh. 9.4 - Prob. 15ACh. 9.4 - Prob. 16ACh. 9 - Prob. 1BYBCh. 9 - Prob. 2BYBCh. 9 - Prob. 3BYBCh. 9 - Prob. S4.4BYBCh. 9 - Section 8.2 What events occur during prophase,...Ch. 9 - Prob. S8.2BYBCh. 9 - Although most men with Klinefelter syndrome are...Ch. 9 - Prob. 2TCCh. 9 - Prob. 3TC
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