Biology: Concepts and Investigations
5th Edition
ISBN: 9781260259049
Author: Hoefnagels
Publisher: MCG
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Chapter 9, Problem 3PIT
3. Create a separate concept map that includes these terms: crossing over, synopsis, gamete, autosome, and homologous pair. You may add other terms to the map as well.
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1. Starting with a “parent” cell that has two homologous chromosomes as pictured below. (diploid), 2n=2 means that this diploid cell has two same-sized, homologous chromosomes. Fill in the circles below. Just draw chromosomes, no spindles or nuclear envelope. “A” and “a” represent alternate alleles of same gene. Use a vertical metaphase plate. Label each cell as haploid (1n) or diploid (2n)= number of chromosomes.
2. There are two pairs of chromosomes in a diploid cell (2n=4). Label the genes and alleles on homologs and sister chromatids. A is on the big chromosome and B is on the smaller chromosome. The genotype is AaBb. Using a vertical metaphase plate, draw the two independent orientations of this AaBb cell in Metaphase I of MEIOSIS.
On the lines above, indicate the genes/alleles in the gametes (after cytokinesis II) that would results from that alignment in the circles above (no crossover has occurred).
3. Discuss, agree and indicate the following on this diagram. If the term…
11. Refer to the figure showing a cell with two pairs of homologous chromosomes in prophase I of meiosis. Genes A (alleles A and a) and D (alleles D and d) are located on the longer pair of chromosomes, and gene B (alleles
B and b) is located on the shorter pair.
BOOB
centromere
DoD
dood
2 chromatids = chromosome
How many different combinations of A, B and D alleles are possible in the genotypes of the daughter cells produced from this cell?
O 16
8.
O O O O
Prophase
Metaphase
Anaphase
Telophase
Chapter 9 Solutions
Biology: Concepts and Investigations
Ch. 9.1 - Prob. 1MCCh. 9.1 - How can asexually reproducing organisms acquire...Ch. 9.1 - Prob. 3MCCh. 9.2 - Prob. 1MCCh. 9.2 - Prob. 2MCCh. 9.3 - How do haploid and diploid nuclei differ?Ch. 9.3 - Prob. 2MCCh. 9.3 - Prob. 3MCCh. 9.3 - Prob. 4MCCh. 9.4 - What happens during interphase
Ch. 9.4 - How do the events of meiosis I and meiosis II...Ch. 9.5 - Prob. 1MCCh. 9.5 - Prob. 2MCCh. 9.5 - How are identical twins different from fraternal...Ch. 9.6 - Prob. 1MCCh. 9.6 - In what ways are mitosis and meiosis different?Ch. 9.7 - Prob. 1MCCh. 9.7 - Prob. 2MCCh. 9.8 - What are the stages of sperm development in...Ch. 9.8 - Prob. 2MCCh. 9.8 - How does gamete production in plants differ from...Ch. 9.9 - Prob. 1MCCh. 9.9 - Prob. 2MCCh. 9 - Prob. 1MCQCh. 9 - Prob. 2MCQCh. 9 - Prob. 3MCQCh. 9 - Prob. 4MCQCh. 9 - Prob. 5MCQCh. 9 - Explain why evolution often selects traits that...Ch. 9 - Describe a situation in which asexual reproduction...Ch. 9 - Prob. 3WIOCh. 9 - Draw all possible metaphase I chromosomal...Ch. 9 - Prob. 5WIOCh. 9 - List examples of abnormalities in chromosome...Ch. 9 - Prob. 7WIOCh. 9 - Prob. 8WIOCh. 9 - 1. Review section 9.5 and the Survey the Landscape...Ch. 9 - 2. Fit the following terms into this concept map:...Ch. 9 - 3. Create a separate concept map that includes...
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- 2. There are two pairs of chromosomes in a diploid cell (2n=4). Label the genes and alleles on homologs and sister chromatids. A is on the big chromosome and B is on the smaller chromosome. The genotype is AaBb. Using a vertical metaphase plate, draw the two independent orientations of this AaBb cell in Metaphase I of MEIOSIS. OR GAMETES:arrow_forward13. Describe TWO ways the process of meiosis introduces variety into its daughter cells. (NOTE: Simply stating that there are 2 divisions and 4 daughter cells are NOT acceptable answers) 14. Given the diploid chromosome number highlighted above, what is the haploid chromosome number? 15. What specific cell(s) will meiotic daughter cells mature into?arrow_forwardFigure 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_forward
- What structure is most important in forming the tetrads? centromere synaptonemal complex chiasma kinetochorearrow_forwardIf a muscle cell of atypical organism has 32 chromosomes, how many chromosomes will be in a gamete of that same organism? 8 16 32 64arrow_forward5.)Gametogenesis, or the formation of gametes, occurs when diploid germ cells undergo meiosis. In fruit flies (Drosophila melanogaster), diploid germ cells contain eight chromosomes. Which of the following correctly describes the number of chromosomes in the daughter cells produced during gametogenesis in fruit flies? The daughter cells each contain four chromosomes after meiosis I and four chromosomes after meiosis II. The daughter cells each contain eight chromosomes after meiosis I and eight chromosomes after meiosis II. The daughter cells each contain eight chromosomes after meiosis I and four chromosomes after meiosis II. The daughter cells each contain four chromosomes after meiosis I and two chromosomes after meiosis II.arrow_forward
- 3. Draw the needed cells and identify the number of chromosomes Scenarios A parent somatic cell with 10 chromosomes A daughter gamete cell with 10 chromosomes A daughter haploid cell with 6 chromosomes A daughter diploid cell with 6 chromosomes A parent cell in the insect's wing with 80 chromosomes Cell division produced a sperm cell with 50 chromosomes Find the number of Chromosomes in daughter or parent cell: Daughter cell: Parent cell: Parent cell: Parent cell: Daughter cell: Parent cell:arrow_forward3. A nondisjunction occurs in the sex chromosomes of a male mouse. What ratio of sex chromosome genotypes would you expect among the gametes in the two following scenarios. Make sure to includethe gamete’s sex chromosome genotype in your genotypic ratio. (A) The nondisjunction of the sex chromosomes occurs only in Meiosis I? (B) The nondisjunction of the sex chromosomes occurs only in Meiosis II?arrow_forward2. What are GAMETES? Are they haploid or diploid? Through what process are they produced? Gametes have how many alleles for each gene? sex, or reproductive, cell containing only one set of dissimilar chromosomes, or half the genetic material necessary to form a complete organism, it is haploid, it is produced by meiosis, they have one allele. 3. If an organism's gametes contain 25 chromosomes, how many chromosomes will their somatic (body cells) contain?| A cell containing 30 chromosomes undergoes mitosis. How many chromosomes will each daughter cell contain? If the cell had undergone meiosis instead, how many chromosomes would the daughter cells 4. contain? acerarrow_forward
- 1. Your class has been studying cell division in a number of organisms with different chromosome numbers. Unfortunately, the slides showing the different stages of mitosis and meiosis got mixed up, and some of them got lost. The figures below show the 12 slides that you have managed to find. The organism that you have been studying has a 2n number of 8 with one pair of large metacentric chromosomes, one pair of small metacentric chromosomes, one pair of acrocentric chromosomes and one pair of telocentric chromosomes. a. Do any of the recovered slides below show the stages of cell division indicated in the table in the answer sheet? If so, please write only the slide number in the correct place in the table on your answer sheet. b. Consider slide 6 above. What chromosomal event / phase of cell division is being shown here? c. What is wrong with the picture of this stage of cell division?arrow_forward1. Your class has been studying cell division in a number of organisms with different chromosome numbers. Unfortunately, the slides showing the different stages of mitosis and meiosis got mixed up, and some of them got lost. The figures below show the 12 slides that you have managed to find. The organism that you have been studying has a 2n number of 8 with one pair of large metacentric chromosomes, one pair of small metacentric chromosomes, one pair of acrocentric chromosomes and one pair of telocentric chromosomes. a. Do any of the recovered slides below show the stages of cell division indicated in the table in the answer sheet? If so, please write only the slide number in the correct place in the following, Mitosis, Meosis I and Meosis II. b. Consider slide 6 above. What chromosomal event / phase of cell division is being shown here? c. What is wrong with the picture of this stage of cell division?arrow_forward. If you were asked to complete the table with the correct answer, which of the following table would you chose? А. CHITERIA MITOSIS MEIOSIS 1. Na. of nuciear dimsion 2. Syriapaia/crossing over ECentromere of suster chromatids atanaphase Preseut separates Fresent M-attached/M-separates Haploid S. Na of chromosomes per daughter cell 6 Function Diplaid Growth. Rapair Growth. Repair and Reproduction B. CRITERIA MITOSIS MEIOSIS TNo, af nuclear darinion Synapsin/croing over 3. Centromere af sister chromatids at anaphase Absetit sepiarates Fresent -attached FNo. of daughter cells 5. No. of chromosomes per daughter cell 6 Function Diploid Haploid Growth, Eapair Growth, Repair and Reproduction C. CRITERIA MITOSIS MEIOSIS 1. No. of muclear division 2. Synapsis/crossing over 3. Centromereof sister chromatids at anaphane 4 Na, af daughter cells 5. No. of chromosoetes per daughter cell 6 Punction Absent Present separates MI-attached/Mli-separates Haploid Diploid Gruwth, Repair Reproduction D.…arrow_forward
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