Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 16.4, Problem 1CC
Sexual Reproduction
Concept Check: What is the main purpose of meiosis in animals? What is the main purpose of mitosis in animals?
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2. Why are chromosomes important?
3. How are meiosis I and meiosis II different?
1. What is the state of DNA at the end of meiosis I? What about at the end of meiosis II?
4. Why do you use non-sister chromatids to demonstrate crossing over?
7. Identify two ways that meiosis contributes to genetic recombination.
10. P
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5. What combination of alleles could result from a crossover between BD and bd chromosomes?
8. Why is it necessary to reduce the number of chromosomes in gametes?
6. How many nuclei are present at the end of meiosis II? How many chromosomes are in each?
a. Sperm Cell
b. Egg Cell
AP_5
c. Daughter Cell from Mitosis
ON 5G I
9. Blue whales have 44 chromosomes in every cell. Determine how many chromosomes you would
expect to find in the following:
d. Daughter Cell from Meiosis II
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OeScience Labs, 2016
Need help with question:
- if a nucleus has 12 chromosomes when it begins meiosis, how may chromosomes dose it have after telophase I ? How many are there after telophase II?
- which meiotic phases underlie variation?
- why is it advantageous for a species to have variation with in genetic material? When is it a disadvantage?
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Meiosis stage descriptions
7. homologous pairs line up as tetrads along the middle of the cell
8. one of each homologous pair reaches the ends of the cell, the cell begins pinching in, and two new nuclear membranes form
9. DNA condenses in two haploid cells, the nuclear membranes disintegrate
10. sister chromatids split apart and daughter chromosomes move towards the ends of twn cells
Chapter 16 Solutions
Biology
Ch. 16.1 - Researchers usually treat cells with drugs that...Ch. 16.1 - Which phases make up interphase?Ch. 16.1 - Prob. 1CSCh. 16.1 - Prob. 1EQCh. 16.1 - The Eukaryotic Cell Cycle CoreSKILL What...Ch. 16.1 - Prob. 3EQCh. 16.2 - Prob. 1CCCh. 16.2 - Mitotic Cell Division Concept Check: What are the...Ch. 16.3 - Core Skill: Modeling The goal of this modeling...Ch. 16.4 - Sexual Reproduction Concept Check: What is the...
Ch. 16.5 - Variation in Chromosome Structure and Number...Ch. 16 - Prob. 1TYCh. 16 - Prob. 2TYCh. 16 - Prob. 3TYCh. 16 - Prob. 4TYCh. 16 - Prob. 5TYCh. 16 - Which of the following is not an event of anaphase...Ch. 16 - Prob. 7TYCh. 16 - Which of the following statements accurately...Ch. 16 - Prob. 9TYCh. 16 - Aneuploidy may be the result of a. duplication of...Ch. 16 - Prob. 1CQCh. 16 - Prob. 2CQCh. 16 - Prob. 3CQCh. 16 - Prob. 1COQCh. 16 - A diploid eukaryotic cell has 10 chromosomes (5...
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- Meiosis stage descriptions 7. homologous pairs line up as tetrads along the middle of the cell 8. one of each homologous pair reaches the ends of the cell, the cell begins pinching in, and two new nuclear membranes form 9. DNA condenses in two haploid cells, the nuclear membranes disintegrate 10. sister chromatids split apart and daughter chromosomes move towards the ends of two cells 11. DNA replication has occured, DNA decondensed in one cell 12. four cells with half of the genetic material of a body cell result, all are different from each other Match the picture or the image with the name of the stage it represents. Use each stage just once for either an image or description.arrow_forward..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 chromosomesarrow_forward| The Role of Meiosis Key Idea: There are two types of cell division in eukaryotes, mitosis and meiosis, but only meiosis produces cells that are genetically different to the parent cell. New cells are formed when existing cells divide. There are two forms of cell division in eukaryotes, mitosis and meiosis. Mitosis produces two identical daughter cells from a parent cell. Meiosis is a special type of cell division, and produces sex cells (gametes or spores) for sexual reproduction. In sexual reproduction, sex cells from two parents combine to form an individual that is genetically different to its parents. The sex cells in humans, called eggs and sperm, are produced by meiosis. Events occurring during meiosis creates gametes with unique combinations of gene variants and so creates genetic variability. Sexual reproduction rearranges and reshuffles the genetic material into new combinations. This is why family members may look similar, but they'll never be identical (except for…arrow_forward
- Chapter 5: Mitosis and Meiosis BLM 5.1-2 A Diagrammatic Comparison of Mitosis and Meiosis Name: Draw chromosomes in the following cells to represent the various stages of mitosis and meiosis for an organism with a diploid number of 4. Label your diagrams with descriptions of the chromosomes and the key events that are occurring during this stage of the process.arrow_forwardN Question How does the progeny formed from asexual reproduction differ from those formed by sexual reproduction?arrow_forwardQ7: 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.arrow_forward
- Which statement best describes the genetic content of the two daughter cells in prophase II of meiosis? haploid with one copy of each gene haploid with two copies of each gene diploid with two copies of each gene diploid with four copies of each genearrow_forwardIn what ways is meiosis II similar to and different from mitosis of a diploid cell?arrow_forwardMeiosis: Sequence of Stages Number the stages of meiosis from 1 to 8 to show their correct chronological sequence. [Choose] [Choose] Prophase I Prophase II Metaphase I libraries Anaphase I Telophase I Telophase II Anaphase II Metaphase II nstructional urvey 3. 4 [Choose ] [Choose ) 6 [Choose] 7. [Choose ] 8. [Choose] > >arrow_forward
- Comic San.. BIUA ===|三 Normal text 12 II1 3 CP Unit 6 Review: Meiosis Page 1. What type of cell undergoes meiosis? Gamete cells Somațic cells or 2. What are homologous chromosomes? 3. For each of the following state if the cell is haploid or diploid. Sperm cell = Liver cell = Egg cell = Stomach cell = 4. If the diploid number in a liver cell is 52, how many chromosomes are there in the egg of this organism? 5. During meiosis, the chromosome number: a) is doubled becomes diploid b) is reduced c) remains the same d) 6. Cells starting mitosis & meiosis begin with a (haploid or diploid) set of chromosomes. 7. How many times do cells divide during meiosis? 8. What are the stages of meiosis called? Meiosis I: II lılıarrow_forwardSelect two that apply. Which of the following generate genetic diversity in meiosis? homologous chromosomes are separated during anaphase II homologous chromosomes align individually during metaphase II O bivalents align independently from other bivalents during metaphase I sister chromatids exchange genetic material during prophase I homologous chromosomes exchange genetic material during prophase I meiosis goes through two rounds of divisionarrow_forwardDraw the stages of MEIOSIS. Start with two pairs of homologous chromosomes (this is how many PAIRS of chromosomes the somatic cell would have). Start with the END OF G2, then continue with the different stages of MEIOSIS, and then finish with the BEGINNING of G1.arrow_forward
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