Campbell Biology Plus Masteringbiology
10th Edition
ISBN: 9780321775849
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 24.2, Problem 4CC
MAKE CONNECTIONS Ø Review the process of meiosis in Figure 13.8. Describe how an error during meiosis could lead to polyploidy.
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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?
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.
Think about the alignment of tetrads on the metaphase plate during meiosis I. What is meant by the statement that full siblings “ON AVERAGE” share 50% of their DNA? Could two siblings from the same parents share more or less than 50% of their DNA? How?
Chapter 24 Solutions
Campbell Biology Plus Masteringbiology
Ch. 24.1 - Prob. 1CCCh. 24.1 - WHAT IF? Suppose two bird species live in a...Ch. 24.2 - Summarize key differences between allopatric and...Ch. 24.2 - Prob. 2CCCh. 24.2 - WHAT IF? Is allopatric speciation more likely to...Ch. 24.2 - MAKE CONNECTIONS Review the process of meiosis in...Ch. 24.3 - 1. What are hybrid zones, and why can they be...Ch. 24.3 - WHAT IF? Consider two species that diverged while...Ch. 24.4 - Speciation can occur rapidly between diverging...Ch. 24.4 - Prob. 2CC
Ch. 24.4 - Prob. 3CCCh. 24 - Explain the role of gene flow in the biological...Ch. 24 - Can factors that cause sympatric speciation also...Ch. 24 - What factors can support the long-term stability...Ch. 24 - Is speciation something that happened only in the...Ch. 24 - The largest unit within which gene flow can...Ch. 24 - Prob. 2TYUCh. 24 - Prob. 3TYUCh. 24 - Prob. 4TYUCh. 24 - Which of the following factors would not...Ch. 24 - Plant species A has a diploid chromosome number of...Ch. 24 - Prob. 7TYUCh. 24 - SCIENTIFIC INQUIRY DRAW IT In this chapter, you...Ch. 24 - Prob. 9TYUCh. 24 - Prob. 10TYUCh. 24 - WRITE ABOUT A THEME: INFORMATION In sexually...Ch. 24 - Prob. 12TYU
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- VISUALIZE Sketch a series of diagrams showing each of the following, making sure to end each series with haploid cells: (a)How a pair of alleles for a single locus segregate in meiosis (b)How the alleles of two unlinked loci assort independently in meiosis (c)How the alleles of two linked loci undergo genetic recombinationarrow_forwardUsing diagrams, illustrate how nondisjunction can result in an aneuploid zygote.arrow_forwardWhich 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_forward
- Figure 13.6 Which of the following statements about nondisjunction is true? Nondisjunction only results in gametes with n+1 or n-1 chromosomes. Nondisjunction occurring during meiosis II results in 50 percent normal gametes. Nondisjunction during meiosis I results in 50 percent normal gametes. Nondisjunction always results in four different kinds of gametes.arrow_forward14. generate(s) 2 haploid cells from every parent cell. 1. Neither mitosis nor meiosis 2. Both mitosis and meiosisarrow_forward1. List three ways in which mitosis differs from meiosis. Be specificMITOSIS MEIOSIS1. 2. 3. 2. What would happen to the chromosome number in gametes and offspring if gametes were formed by the mitotic process instead of the meiotic process?arrow_forward
- Q. What are the possible changes in chromosome number and structure that will occur in a living species with six haploid chromosomes ? You can give the phenotypic changes that will occur on a real and / or hypothetical sample.arrow_forwardafter meiosis 1 , explain what happened to the number of chromosomes in the daughter cells compared to the parent germ cell ( originally contained 46 chromosomes- diploid?arrow_forward19. Consider the data below to answer item 19. What information can be provided in the column for meiosis? A. 4 - n or haploid B. 4 - 2n or diploid C. 2 - 2n or diploid D. 2 - n or haploidarrow_forward
- Sketch a comparison of Metaphase Mitosis and Metaphase I Meiosis (diploid:8 chromosomes n=4) - Be sure to number the chromosomes and use a “P” for paternal and “M” for maternal.arrow_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_forwardWrite short notes on the following: - The four basic types of chromosomal structure arrangements? - Aneuploidy illustrating non-disjunction in meiosis I and IIarrow_forward
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