Textbook Question
Examine the following diagrams of cells from an organism with diploid number 2n=6, and identify what stage of M phase is represented.
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Ch. 3 - Cell Division and Chromosome Heredity
Sanders3rd EditionGenetic Analysis: An Integrated ApproachISBN: 9780135564172
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Table of contents
- Ch. 1 - The Molecular Basis of Heredity, Variation, and Evolution64
- Ch. 2 - Transmission Genetics144
- Ch. 3 - Cell Division and Chromosome Heredity81
- Ch. 4 - Gene Interaction87
- Ch. 5 - Genetic Linkage and Mapping in Eukaryotes103
- Ch. 6 - Genetic Analysis and Mapping in Bacteria and Bacteriophages73
- Ch. 7 - DNA Structure and Replication71
- Ch. 8 - Molecular Biology of Transcription and RNA Processing79
- Ch. 9 - The Molecular Biology of Translation110
- Ch. 10 - Eukaryotic Chromosome Abnormalities and Molecular Organization100
- Ch. 11 - Gene Mutation, DNA Repair, and Homologous Recombination86
- Ch. 12 - Regulation of Gene Expression in Bacteria and Bacteriophage90
- Ch. 13 - Regulation of Gene Expression in Eukaryotes38
- Ch. 14 - Analysis of Gene Function via Forward Genetics and Reverse Genetics72
- Ch. 15 - Recombinant DNA Technology and Its Applications69
- Ch. 16 - Genomics: Genetics from a Whole-Genome Perspective49
- Ch. 17 - Organelle Inheritance and the Evolution of Organelle Genomes27
- Ch. 18 - Developmental Genetics43
- Ch. 19 - Genetic Analysis of Quantitative Traits66
- Ch. 20 - Population Genetics and Evolution at the Population, Species, and Molecular Levels105
Sanders3rd EditionGenetic Analysis: An Integrated ApproachISBN: 9780135564172Not the one you use?Change textbook
Chapter 3, Problem 2c
Our closest primate relative, the chimpanzee, has a diploid number of 2n = 48. For each of the following stages of M phase, identify the number of chromosomes present in each cell.
End of meiotic anaphase II
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Understand the diploid number of the chimpanzee: 2n = 48. This means the organism has 48 chromosomes in its diploid cells, with 24 chromosomes in each haploid cell (n = 24).
Recall that meiosis consists of two divisions: meiosis I and meiosis II. Meiosis II is similar to mitosis, where sister chromatids are separated into different cells.
At the end of meiotic anaphase II, sister chromatids have been pulled apart to opposite poles of the cell. Each chromatid is now considered an individual chromosome.
Since meiosis II starts with haploid cells (n = 24), and each chromosome splits into two chromatids during anaphase II, there will be 24 chromosomes at each pole of the cell.
After the completion of anaphase II, the cell will proceed to cytokinesis, resulting in two haploid daughter cells, each containing 24 chromosomes.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Diploid and Haploid Numbers
Diploid (2n) refers to cells that contain two complete sets of chromosomes, one from each parent. In the case of chimpanzees, the diploid number is 48, meaning they have 24 pairs of chromosomes. During meiosis, cells undergo two rounds of division, ultimately producing haploid (n) cells, which contain only one set of chromosomes.
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Diploid Genetics
Meiosis
Meiosis is a specialized form of cell division that reduces the chromosome number by half, resulting in four genetically diverse haploid cells. It consists of two main stages: meiosis I, where homologous chromosomes are separated, and meiosis II, where sister chromatids are separated. Understanding the stages of meiosis is crucial for determining the chromosome number at specific points, such as anaphase II.
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Anaphase II
Anaphase II is a stage in meiosis II where the sister chromatids are pulled apart to opposite poles of the cell. At this point, each chromatid is considered an individual chromosome. For chimpanzees, with a diploid number of 48, during anaphase II, there would be 48 chromosomes present in total, as each of the 24 pairs has been separated into individual chromatids.
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Related Practice
Textbook Question
Our closest primate relative, the chimpanzee, has a diploid number of 2n = 48. For each of the following stages of M phase, identify the number of chromosomes present in each cell.
End of mitotic telophase
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Textbook Question
Our closest primate relative, the chimpanzee, has a diploid number of 2n = 48. For each of the following stages of M phase, identify the number of chromosomes present in each cell.
Meiotic metaphase I
Textbook Question
Our closest primate relative, the chimpanzee, has a diploid number of 2n = 48. For each of the following stages of M phase, identify the number of chromosomes present in each cell.
Early mitotic prophase
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Textbook Question
Our closest primate relative, the chimpanzee, has a diploid number of 2n = 48. For each of the following stages of M phase, identify the number of chromosomes present in each cell.
Mitotic metaphase
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Textbook Question
Our closest primate relative, the chimpanzee, has a diploid number of 2n = 48. For each of the following stages of M phase, identify the number of chromosomes present in each cell.
Early prophase I