•.explain why meiosis occurs only in specialized cells (gametes), and that the overall goal of meiosis is to make haploid cells for sexual reproduction • .outline the sequence of key chromosomal movements and rearrangements during the two meiotic divisions, identifying key similarities and differences between meiosis and mitosis • ..describe the ploidy of a cell before and after meiosis I and meiosis II, and how ploidy changes after separation of sister chromatids and homologous chromosomes

•.explain why meiosis occurs only in specialized cells (gametes), and that the overall goal of meiosis is to make haploid cells for sexual reproduction • .outline the sequence of key chromosomal movements and rearrangements during the two meiotic divisions, identifying key similarities and differences between meiosis and mitosis • ..describe the ploidy of a cell before and after meiosis I and meiosis II, and how ploidy changes after separation of sister chromatids and homologous chromosomes

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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Q7: The diagram below shows a cell during Meiosis II: (A) Kinetochore Kinetochore microtubule Centrosome Centriole Polar microtubule LIFE 8e, Figure 9.9 (Part 1) LIFE THE SCIENCE OF BIOLOGY, Elghth Edtion 02007 Sinauer Associates, Inc. and W. H. Freeman & Co. а. What phase of Meiosis II is the cell in? How do you know? b. Assuming all of the chromosomes present during Meiosis II are shown in the figure above, how many chromosomes (counting homologous pairs as two chromosomes) does a gamete from this organism have? с. Draw the same cell during the same phase of Meiosis I. Label the elements.
20. Which of the following occurs during mitosis but not during meiosis I? (A) The chromosomes are pulled to opposite poles of the spindle apparatus. (B) The chromatids of each chromosome are separated. (C) The nuclear envelope breaks down. (D) Both synapsis and crossingover take place. (E) The diploid number of chromosomes is reduced to the haploid number. 21. Oxygen consumption can be used as a measure of metabolic rate because oxygen is (A) necessary for ATP synthesis by oxidative phosphorylation (B) necessary to replenish glycogen levels (C) necessary for fermentation to take place (D) required by all living organisms (E) required to break down the ethanol that is produced in muscles 22. Membranes are components of all of the following EXCEPT a (A) microtubule (В) nu (C) Golgi apparatus (D) mitochondrion (E) lysosome 23. In a mesophyll cell of a leaf, the synthesis of ATP occurs in which of the following? I. Ribosomes II. Mitochondria III. Chloroplasts (A) I only (В) II only (C)…
• When do chiasmata develop during meiosis? (Please be specific!)• How do chiasmata affect chromosomes?• Explain how the development of chiasmata leads to genetic variation in meiotic cells.
. A mature female wolf, with 78 diploid chromosomes in each somatic cell, produces haploid oocytes (egg cells) containing how many chromosomes per cell? 1 sex-determining chromosome (Y) and 38 autosomes 2 sex-determining chromosomes (XX) and 76 autosomes 1 sex-determining chromosome (X) and 39 autosomes 2 sex-determining chromosomes (XY) and 76 autosomes 1 sex-determining chromosome (X) and 38 autosomes