Textbook Question
At the end of meiosis, each cell has ________ chromosomes and they are genetically ________ from the original cell.
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Ch. 26 The Reproductive System
Amerman2nd EditionHuman Anatomy & PhysiologyISBN: 9780136873822
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Table of contents
- Ch. 1 Introduction to Anatomy and Physiology26
- Ch. 2 The Chemistry of Life38
- Ch. 3 The Cell55
- Ch. 4 Histology47
- Ch. 5 The Integumentary System30
- Ch. 6 Bones and Bone Tissue36
- Ch. 7 The Skeletal System40
- Ch. 8 Articulations19
- Ch. 9 The Muscular System36
- Ch. 10 Muscle Tissue and Physiology29
- Ch. 11 Introduction to the Nervous System and Nervous Tissue28
- Ch. 12 The Central Nervous System42
- Ch. 13 The Peripheral Nervous System41
- Ch. 14 The Autonomic Nervous System and Homeostasis31
- Ch. 15 The Special Senses39
- Ch. 16 The Endocrine System42
- Ch. 17 The Cardiovascular System I: The Heart30
- Ch. 18 The Cardiovascular System II: The Blood Vessels43
- Ch. 19 Blood32
- Ch. 20 The Lymphatic System and Immunity45
- Ch. 21 The Respiratory System27
- Ch. 22 The Digestive System27
- Ch. 23 Metabolism and Nutrition7
- Ch. 24 The Urinary System39
- Ch. 25 Fluid, Electrolyte, and Acid-Base Homeostasis39
- Ch. 26 The Reproductive System10
- Ch. 27 Development and Heredity5
Chapter 26, Problem 2
Match the specific phase of meiosis with the correct description.
________Prophase I
________Metaphase I
________Anaphase I
________ Telophase I
________Prophase II
________Metaphase II
________Anaphase II
________ Telophase II
a. Homologous chromosomes arrive at opposite poles.
b. Homologous chromosomes line up.
c. Chromosomes line up at the equator.
d. Independent assortment occurs.
e. Separated sister chromatids arrive at opposite poles.
f. Sister chromatids remain condensed.
g. Crossing over occurs.
h. Sister chromatids pull apart.
Verified step by step guidance1
Understand that meiosis is a two-part process (Meiosis I and Meiosis II) that reduces the chromosome number by half and is essential for sexual reproduction. Each phase has specific events that occur.
Match the descriptions to the phases of Meiosis I:
- Prophase I: Crossing over occurs (g). This is when homologous chromosomes exchange genetic material, increasing genetic diversity.
- Metaphase I: Homologous chromosomes line up (b). This is when homologous pairs align at the metaphase plate.
- Anaphase I: Independent assortment occurs (d). Homologous chromosomes are pulled to opposite poles, ensuring genetic variation.
- Telophase I: Homologous chromosomes arrive at opposite poles (a). The cell begins to divide into two haploid cells.
Match the descriptions to the phases of Meiosis II:
- Prophase II: Sister chromatids remain condensed (f). This phase prepares the chromosomes for the second division.
- Metaphase II: Chromosomes line up at the equator (c). This is similar to metaphase in mitosis, but involves haploid cells.
- Anaphase II: Sister chromatids pull apart (h). The chromatids are separated and move to opposite poles.
- Telophase II: Separated sister chromatids arrive at opposite poles (e). This results in four haploid daughter cells.
Review the key differences between Meiosis I and Meiosis II: Meiosis I separates homologous chromosomes, while Meiosis II separates sister chromatids. This distinction helps in correctly matching the descriptions.
Double-check your matches by ensuring that each description corresponds to the correct phase based on the events that occur during meiosis. This will help reinforce your understanding of the process.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Meiosis Stages
Meiosis consists of two sequential divisions: meiosis I and meiosis II, each with distinct phases. In meiosis I, homologous chromosomes are separated, while meiosis II separates sister chromatids. Understanding these stages is crucial for matching the phases with their descriptions.
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4:49
Meiosis I & Meiosis II
Homologous Chromosomes
Homologous chromosomes are pairs of chromosomes, one inherited from each parent, that are similar in shape, size, and genetic content. During meiosis I, these chromosomes undergo processes like crossing over and independent assortment, which are essential for genetic diversity.
Recommended video:
06:44Law of Independent Assortment
Chromosome Behavior
The behavior of chromosomes during meiosis includes processes such as alignment at the metaphase plate, separation during anaphase, and the formation of new nuclei in telophase. Recognizing how chromosomes behave in each phase helps in accurately matching the phases with their corresponding descriptions.
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4:49Adaptation
Related Practice
Textbook Question
Mr. Hassan has recently started getting up during the night to urinate and has also noticed that he is having trouble emptying his bladder. He has made a doctor's appointment, but his wife has already told him that the doctor will want to check his prostate. Do you think his wife is correct? Explain your answer.
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Textbook Question
Sustentacular cells in the testes are nicknamed 'nurse cells.' Explain why the nickname is appropriate.
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Textbook Question
The second meiotic division is very similar to mitosis. How would you explain the differences between the first meiotic division and mitosis?
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