Textbook Question
The following diagram shows a cell in meiosis. Identify the stage of meiosis shown.
Ch. 13 - Meiosis and Sexual Life Cycles
Urry11th EditionCampbell BiologyISBN: 9789357423311
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Table of contents
- Ch. 1 - Evolution, the Themes of Biology, and Scientific Inquiry8
- Ch. 2 - The Chemical Context of Life8
- Ch. 3 - Water and Life6
- Ch. 4 - Carbon and the Molecular Diversity of Life9
- Ch. 5 - The Structure and Function of Large Biological Molecules9
- Ch. 6 - A Tour of the Cell6
- Ch. 7 - Membrane Structure and Function6
- Ch. 8 - An Introduction to Metabolism6
- Ch. 9 - Cellular Respiration and Fermentation10
- Ch. 10 - Photosynthesis7
- Ch. 11 - Cell Communication7
- Ch. 12 - The Cell Cycle10
- Ch. 13 - Meiosis and Sexual Life Cycles10
- Ch. 14 - Mendel and the Gene Idea14
- Ch, 15 - The Chromosomal Basis of Inheritance7
- Ch. 16 - The Molecular Basis of Inheritance9
- Ch. 17 - Gene Expression: From Gene to Protein9
- Ch. 18 - Regulation of Gene Expression10
- Ch. 19 - Viruses6
- Ch. 20 - DNA Tools and Biotechnology8
- Ch. 21 - Genomes and Their Evolution8
- Ch. 22 - Descent with Modification: A Darwininan View of Life6
- Ch. 23 - The Evolution of Populations5
- Ch. 24 - The Origin of Species6
- Ch. 25 - The History of Life on Earth6
- Ch. 26 - Phylogeny and the Tree of Life7
- Ch. 27 - Bacteria and Archaea8
- Ch. 28 - Protists7
- Ch. 29 - Plant Diversity I: How Plants Colonized Land7
- Ch. 30 - Plant Diversity II: The Evolution of Seed Plants7
- Ch. 31 - Fungi5
- Ch. 32 - An Overview of Animal Diversity4
- Ch. 33 - An introduction to Invertebrates6
- Ch. 34 - The Origin and Evolution of Vertebrates7
- Ch. 35 - Vascular Plant Structure, Growth, and Development8
- Ch. 36 - Resource Acquisition and Transport in Vascular Plants8
- Ch. 37 - Soil and Plant Nutrition10
- Ch. 38 - Angiosperm Reproduction and Biotechnology8
- Ch. 39 - Plant Responses to Internal and External Signals8
- Ch. 40 - Basic Principles of Animal Form and Function8
- Ch. 41 - Animal Nutrition7
- Ch. 42 - Circulation and Gas Exchange7
- Ch. 43 - The Immune System6
- Ch. 44 - Osmoregulation and Excretion6
- Ch. 45 - Hormones and the Endocrine System8
- Ch. 46 - Animal Reproduction8
- Ch. 47 - Animal Development8
- Ch. 48 - Neurons, Synapses, and Signaling6
- Ch. 49 - Nervous Systems8
- Ch. 50 - Sensory and Motor Mechanisms5
- Ch. 51 Animal Behavior6
- Ch. 52 - An Introduction to Ecology and the Biosphere7
- Ch. 53 - Population Ecology10
- Ch. 54 - Community Ecology9
- Ch. 55 - Ecosystems and Restoration Ecology8
- Ch. 56 - Conservation Biology and Global Change6
Chapter 13, Problem 5
If we continue to follow the cell lineage from question 4, then the DNA content of a single cell at metaphase of meiosis II will be
a. 0.25x
b. 0.5x
c. x.
d. 2x
Verified step by step guidance1
Understand the stages of meiosis: Meiosis consists of two consecutive divisions, meiosis I and meiosis II. Meiosis I reduces the chromosome number by half, while meiosis II separates sister chromatids.
Recall the DNA content changes: At the start of meiosis I, a cell has a DNA content of 2x, where x represents the DNA content of a haploid cell. After meiosis I, the DNA content is reduced to x in each daughter cell.
Consider the state at metaphase of meiosis II: At this stage, the cell is preparing to separate sister chromatids, but the DNA content remains the same as after meiosis I, which is x.
Analyze the options given: Compare the DNA content at metaphase of meiosis II (x) with the options provided: a. 0.25x, b. 0.5x, c. x, d. 2x.
Select the correct answer: Based on the analysis, identify which option correctly represents the DNA content of a single cell at metaphase of meiosis II.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Meiosis II
Meiosis II is the second division in meiosis, where sister chromatids are separated into different cells. Unlike meiosis I, which reduces the chromosome number by half, meiosis II maintains the chromosome number, resulting in four haploid cells from the original diploid cell. Understanding meiosis II is crucial for determining DNA content during metaphase.
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Meiosis II
Metaphase of Meiosis II
During metaphase of meiosis II, chromosomes align at the metaphase plate, similar to metaphase in mitosis. Each chromosome consists of two sister chromatids, and the spindle fibers attach to the centromeres. This stage is critical for understanding the distribution of genetic material and calculating DNA content in the cell.
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DNA Content in Meiosis
DNA content refers to the amount of genetic material present in a cell. In meiosis, DNA content changes as cells progress through different stages. At metaphase of meiosis II, the DNA content is 'x' because the cell has completed meiosis I, halving the original diploid DNA content, and is now preparing to separate sister chromatids.
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Related Practice
Textbook Question
If the DNA content of a diploid cell in the G1 phase of the cell cycle is x, then the DNA content of the same cell at metaphase of meiosis I will be
a. 0.25x
b. 0.5x
c. x
d. 2x
Textbook Question
The diagram shows a cell in meiosis. Label the appropriate structures with these terms: chromosome (label as duplicated or unduplicated), centromere, kinetochore, sister chromatids, nonsister chromatids, homologous pair (use a bracket when labeling), homolog (label each one), chiasma, sister chromatid cohesion, and gene loci, labeling the alleles of the F and H genes.
Textbook Question
Meiosis II is similar to mitosis in that
a. Sister chromatids separate during anaphase
b. DNA replicates before the division
c. The daughter cells are diploid
d. Homologous chromosomes synapse
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Textbook Question
The two homologs of a pair move toward opposite poles of the dividing cell during
a. Mitosis
b. Meiosis I
c. Meiosis II
d. Fertilization
Textbook Question
The diagram shows a cell in meiosis. Describe the makeup of a haploid set and a diploid set.
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