Campbell Biology Custom Stony Brook 10 Th Edition
10th Edition
ISBN: 9781269870818
Author: Reece Urry Cain Wasserman Minorsky 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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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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FILLER
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
The 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 elements
Genetic problems:
Use the diagram below to figure out how each monosomy or trisomy can
a) Normal X chromosome
segregation
b) Nondisjunction in
meiosis I
c) Nondisjunction in
meiosis II
Diploid cell at start of
meiosis
First meiotic division
Nondisjunction
Second meiotic
division
Nondisjunction
00 00
develop.
Benjamim
XCuinmi
х Х х х
Xх хх о о
XX O
2. A color-blind man married a normal woman. Their daughter, who was phenotypically normal, married
a normal man and the couple produced three children, a normal boy, a color-blind boy, and a color-blind
girl. Further examination indicates that this girl has two X chromosomes. Explain the origin of the color-
blind girl.
Chapter 24 Solutions
Campbell Biology Custom Stony Brook 10 Th Edition
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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- 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_forwardVISUALIZE 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_forwardMitosis produces 2 daughter cells that are identical to the starting cell. Explain how meíosis is different using this diagram to help you. 1) How many cells are created through meiosis? 2) Describe the chromosomes in each gamete at the end of meiosis? Are the set of chromosomes in a gamete identical to the starting cell like they are in mitosis? Are there the same number of chromosomes in each gamete as the starting cell? Starting cell's chromosomes: 1А, 1B, 2A, 2B Interphase After the S phase of interphase: 4 pairs of sister chromatids 1A 1A 1B 1B 2A 2A 2B 2B Meiosis has 2 rounds of cell division 1A, 1A, 1B, 1B, 2A 2B 2A 2B tv MacBook Air DII DD 80 888 F9 F10 F6 F7 F8 F4 F3 * #3 2$ % & 8 9 3 4 E T. Y F G J K * CO Rarrow_forward
- Using diagrams, illustrate how nondisjunction can result in an aneuploid zygote.arrow_forwardA cell has a diploid number of 6 (2n = 6). a. Draw the cell in metaphase of meiosis I. b. Draw the cell in metaphase of mitosis. c. How many chromosomes are present in a daughter cell after meiosis I? d. How many chromatids are present in a daughter cell after meiosis II? e. How many chromosomes are present in a daughter cell after mitosis? f. How many pairs of homologous chromosomes are visible in the cell in metaphase of meiosis I?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
- Picture name - Tradescantia spathacea meiotic cell. HPO (400x)Shown below are photomicrographs of Rhoeo tradescantia cells undergoing meiosis. Answer the following question for each of the photomicrographs: Identify the cytogenetic abnormality observed (ex. ring, chain, laggard, bridge). Identify the meiotic stage in which these aberrations are observed (as shown in the photomicrograph). Explain how these aberrations are formed and relate to the possible causal mutation(s). Will this result to sterile and/or fertile gametes? Explain.arrow_forwarda. 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 elements.arrow_forwardOn the three horizontal lines in the center, label the following stages of Meiosis:Metaphase I, Metaphase II and gametes. • In the top left circle, draw Metaphase I of Meiosis for a cell that is 2n=4 (two large and two small chromosomes). 1) Draw chromosomes as an X or /, not decondensed. 2) Since we are focusing on the DNA, do not draw the nuclear membrane or spindle fibers. 3) For simplicity, do not indicate crossover in your diagrams. 4) Use different colors for each "set" of information (one large and one small chromosome). 5) Using the same genes/alleles as DTL 15 & 16, mark gene locations and label them in each cell. 6) Make sure you show that homologous chromosomes are the same size and sister chromatids are identical. • On the right side of the line, draw the second way homologs could line up Metaphase 1. Make sure that homologs are paired, just flip one of the pairs. ● Draw the resulting chromosomes in Metaphase II and gametes. Notice that there are four types of gametes. In…arrow_forward
- Draw 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_forwardView the meiosis 1 and 2 animation 7. At the end of meiosis 2, each cell contains how many chromosomes? Part 4: A Review of Meiosis 8. Name 2 errors that can occur during meiosis. Phase Diagrams Label these phases xXx -XX XX XX 151118arrow_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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