Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
3rd Edition
ISBN: 9780134895727
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky
Publisher: PEARSON
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Chapter 22.2, Problem 3CC
MAKE CONNECTIONS Review the process of meiosis in Figure 10.8. Describe how an error during meiosis could lead to polyploidy.
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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
COUS
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OeScience Labs, 2016
MAKE CONNECTIONS Look at Figure 12.7 and imagine the twodaughter cells undergoing another round of mitosis, yielding four cells.Compare the number of chromosomes in each of those four cells, aftermitosis, with the number in each cell in Figure 13.8, after meiosis. Whatis it about the process of meiosis that accounts for this difference, eventhough meiosis also includes two cell divisions?
Chapter 22 Solutions
Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
Ch. 22.1 - Prob. 1CCCh. 22.1 - WHAT IF? Suppose you are studying two bird species...Ch. 22.2 - Contrast allopatric and sympatric speciation....Ch. 22.2 - WHAT IF? Is allopatric speciation more likely to...Ch. 22.2 - MAKE CONNECTIONS Review the process of meiosis in...Ch. 22.3 - What are hybrid zones, and why can they be viewed...Ch. 22.3 - WHAT IF? Consider two species that diverged while...Ch. 22.4 - Speciation can occur rapidly between diverging...Ch. 22.4 - Summarize evidence that the yup flower-color locus...Ch. 22.4 - MAKE CONNECTIONS Compare Figure 10.11 with Figure...
Ch. 22 - The largest unit within which gene flow can...Ch. 22 - Males of different species of the fruit fly...Ch. 22 - According to the punctuated equilibria model, A....Ch. 22 - Bird guides once listed the myrtle warbler and...Ch. 22 - Which of the following factors would not...Ch. 22 - Plant species A has a diploid number of 12. Plant...Ch. 22 - SCIENCE, TECHNOLOGY, AND SOCIETY In the United...Ch. 22 - SCIENTIFIC INQUIRY DRAW IT In this chapter, you...Ch. 22 - FOCUS ON EVOLUTION Explain the biological basis...Ch. 22 - FOCUS ON INFORMATION In sexually reproducing...Ch. 22 - Suppose that females of one population of straw-...
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- VISUALIZE Draw a simple sketch illustrating how nondisjunction in meiosis can lead to Down syndrome.arrow_forwardNeed 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?arrow_forwardCan you help?arrow_forward
- please complete all partsarrow_forwardQ34arrow_forwardThe diagram below shows a cell during Meiosis II: a) 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? c) Draw the same cell during the same phase of Meiosis I. Label the elementsarrow_forward
- Picture 1 Picture 2 Picture 3 Picture 4 Picture 5 Picture 6 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 cellsarrow_forwardMeiosis 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_forwardGQ6arrow_forward
- GQ5arrow_forwardQ1. Draw and label two cells at anaphase of mitosis and anaphase I of meiosis in a species having 2n - 4 chromosomes (one homologous pair of metacentric chromosomes and a pair of acrocentric chromosomes).arrow_forwardAfter meiosis 1, are the resulting cells haploid or diploid? How can you tell? Group of answer choices 1. haploid; there are no sister chromatids 2. diploid; there are homologous pairs 3. haploid; there are no homologous pairs 4. diploid; there are sister chromatidsarrow_forward
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