Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Chapter 18, Problem 3CT
Adam’s maternal and paternal chromosomes have alternate forms of a gene that influences whether a person is right-handed or left-handed. One form says “right” and its partner says “left.” Visualize one of Adam’s spermatogonia, in which chromosomes are being duplicated prior to meiosis. Visualize what happens to the chromosomes during anaphase I and II. (It might help to use toothpicks as models of the sister chromatids of each chromosome.) What fraction of Adam's sperm will carry the gene for right-handedness? For left-handedness?
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A diploid male organism has two homologous chromosomes. A and B are from its maternal parent, while A’ and B’ are from its paternal parent. Draw the chromosomes at the following stages: a, anaphase of mitosis b. anaphase of the first meiotic division c, anaphase of the second meiotic division
If the same chromosomes were involved in meiosis in a female, would the kind of egg nuclei produced be different from the sperm nuclei? Why?
Meiosis is an important cellular process for organisms that reproduce sexually. Two lab partners (A and B) are shown this diagram of a meiotic cell and asked to identify its phase.
Partner A believes that this cell is in prophase of the first meiotic division. Partner B believes that this cell has moved past prophase of meiosis I and is in a later phase of meiosis.
Which partner is correct, and what evidence accurately would defend their belief?
Partner A is correct. The chromosomes have clearly replicated during interphase and are beginning to decondense into chromatin.
O Partner A is correct. The nuclear membrane is beginning to re-form and centrioles are beginning to migrate to opposite poles of the cell.
Partner B is correct. Homologous chromosomes are no longer paired together, so the cell must be in first phase of meiosis II, not meiosis I.
O Partner B is correct. The cell plate is beginning to form between the two centrioles, indicating the cell is actually in later phase of…
Meiosis involves two phases, meiosis I and meiosis
II. This type of cell division occurs during the
formation of both sperm and ovum. The first
meiotic division of the primary spermatocyte results
in two secondary spermatocytes. .What is the result
of the first meiotic division of the primary oocyte?
two secondary oocytes
two polar bodies
O two ovum
one secondary oocyte and one polar body
Chapter 18 Solutions
Human Biology (MindTap Course List)
Ch. 18 - Prob. 1RQCh. 18 - Prob. 2RQCh. 18 - Prob. 3RQCh. 18 - Name the four main stages of mitosis, and describe...Ch. 18 - Prob. 5RQCh. 18 - Prob. 6RQCh. 18 - Prob. 1SQCh. 18 - Prob. 2SQCh. 18 - Prob. 3SQCh. 18 - Prob. 4SQ
Ch. 18 - Prob. 5SQCh. 18 - After mitosis, each daughter cell contains genetic...Ch. 18 - All of the following are stages of mitosis except...Ch. 18 - Prob. 8SQCh. 18 - Prob. 9SQCh. 18 - Because of the ________ alignment of homologous...Ch. 18 - Match the stage of mitosis with the following key...Ch. 18 - Normally you cant inherit both copies of a...Ch. 18 - Suppose you have a way of measuring the amount of...Ch. 18 - Adams maternal and paternal chromosomes have...Ch. 18 - Fresh out of college, Maria has her first job...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- During which phases of the mitotic cycle would the terms chromosome and chromatid refer to identical structures?arrow_forwardOogenesis is the process of female gamete (ovum or egg) production in animals. Spermatogenesis is the process of male gamete (sperm) production in animals. Although both processes produce gamete(s), there are distinct similarities and differences between the two. Compare and contrast oogenesis to spermatogenesis by drawing a diagram showing the two processes. In your hand-drawn diagrams, be sure to include when the processes of mitosis, meiosis I and meiosis II are occurring identify each germ cell structure and its ploidy highlight 4 differences between the two processesarrow_forwardFrom this point on, meiosis is very similar (but not exactly similar) to what happened in mitosis. How many copies of each type of chromosome end up in the daughter cells of meiosis when it is complete?arrow_forward
- Examine the diagram below and answer the following questions. a) What specific stage of meiosis is this cell in? b) Exactly how many chromosomes will be in each of the 4 resulting gametes?arrow_forwardGerm cells are specialized cells that develop into gametes. Gametes are produced through the process of meiosis.If the diploid number for humans is 46 chromosomes, how many chromatids does a cell undergoing meiosis have at each of the following phases?Select the row that correctly shows the number of chromatids at each phase. Select one: a. G2 of Interphase Metaphase I Prophase II 92 46 46 b. G2 of Interphase Metaphase I Prophase II 92 92 46 c. G2 of Interphase Metaphase I Prophase II 46 92 23 d. G2 of Interphase Metaphase I Prophase II 46 46 23arrow_forwardIn meiosis, how does prophase I differ from prophase II? During prophase I the chromosomes coil up; the chromosomes are not coiled up during prophase II. In prophase I the sister chromatids are attached; in prophase II the sister chromatids are separated. During prophase I chromosomes line up single file in the middle of the cell; during prophase II the chromosomes line up in double file in the middle of the cell. During prophase I there is one diploid cell; during prophase II there are two haploid cells.arrow_forward
- Explain why sexually reproducing organisms need to have two different types of cell division. What are the advantages of mitosis and of meiosis? (Use the term “genetic diversity” in your answerarrow_forwardThe process of meiosis produces four cells with nonidentical chromosomes. This diversification occurs during: Prophase II Metaphase II Prophase I Telophase Iarrow_forwardMitosis happens throughout the male life cycle however, meiosis takes place only for a limited period of his life cycle. Select one: True False In a human body, kidney cells have a different DNA from the one present in the lung cells, because type does a different function. Select one: True False Mitochondria in cells of plant seeds break down starch to produce energy in the form of ATP Select one: True False When a red blood cell (RBC) is placed in distilled water it will shrink Select one: True Falsearrow_forward
- Construct a table similar to that in Figure 2.12 for the different stages of meiosis, giving the number of chromosomes per cell and the number of DNA molecules per cell for a cell that begins with 4 chromosomes (two homologous pairs) in G1. Include the following stages in your table: G1, S, G2, prophase I, metaphase I, anaphase I, telophase I (after cytokinesis), prophase II, metaphase II, anaphase II, and telophase II (after cytokinesis).arrow_forwardA Common Wombat has 14 chromosomes in one of its somatic cells. One of these cells goes into meiosis. How many cells result, and how many chromosomes does each one of these cells have?arrow_forwardIf a cell has a diploid number of 12 chromosomes before meiosis I and meiosis II, how many chromosomes will be in each of the four daughter cells if one pair of chromatids experiences second-division nondisjunction during meiosis II. Explain your answer.arrow_forward
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