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Some of the resulting gametes have extra chromosomes and some have none. MEIOSIS I MEIOSIS II Two homologous chromosomes pair, whereas the other segregates randomly. First meiotic cell division Anaphase II Gametes Anaphase I (a) 2n D-00 10-0 Pairing of two of three homologous chromosomes In All three chromosomes pair and segregate randomly. (b) In Triploid (3n) cell Pairing of all three homologous chromosomes 2n None of the chromosomes pair and all three move to the same cell. Зп (c) No pairing Chromosomes absent In meiosis in an autotriploid, homologous chromosomes can pair, or fail to pair, in three ways. This example illustrates the pairing and segregation of a single homologous set of chromosomes.

Some of the resulting gametes have extra chromosomes and some have none. MEIOSIS I MEIOSIS II Two homologous chromosomes pair, whereas the other segregates randomly. First meiotic cell division Anaphase II Gametes Anaphase I (a) 2n D-00 10-0 Pairing of two of three homologous chromosomes In All three chromosomes pair and segregate randomly. (b) In Triploid (3n) cell Pairing of all three homologous chromosomes 2n None of the chromosomes pair and all three move to the same cell. Зп (c) No pairing Chromosomes absent In meiosis in an autotriploid, homologous chromosomes can pair, or fail to pair, in three ways. This example illustrates the pairing and segregation of a single homologous set of chromosomes.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Assume that the autotriploid cell in Figure has 3 n = 30 chromosomes. For each of the gametes produced by this cell, give the chromosome number of the zygote that would result if the gamete fused with a normal haploid gamete.

Some of the resulting gametes have extra chromosomes and some have none. MEIOSIS I MEIOSIS II Two homologous chromosomes pair, whereas the other segregates randomly. First meiotic cell division Anaphase II Gametes Anaphase I (a) 2n D-00 10-0 Pairing of two of three homologous chromosomes In All three chromosomes pair and segregate randomly. (b) In Triploid (3n) cell Pairing of all three homologous chromosomes 2n None of the chromosomes pair and all three move to the same cell. Зп (c) No pairing Chromosomes absent In meiosis in an autotriploid, homologous chromosomes can pair, or fail to pair, in three ways. This example illustrates the pairing and segregation of a single homologous set of chromosomes.
Transcribed Image Text:Some of the resulting gametes have extra chromosomes and some have none. MEIOSIS I MEIOSIS II Two homologous chromosomes pair, whereas the other segregates randomly. First meiotic cell division Anaphase II Gametes Anaphase I (a) 2n D-00 10-0 Pairing of two of three homologous chromosomes In All three chromosomes pair and segregate randomly. (b) In Triploid (3n) cell Pairing of all three homologous chromosomes 2n None of the chromosomes pair and all three move to the same cell. Зп (c) No pairing Chromosomes absent In meiosis in an autotriploid, homologous chromosomes can pair, or fail to pair, in three ways. This example illustrates the pairing and segregation of a single homologous set of chromosomes.
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