BIOLOGY CONCEPT&INVERTIGATIO PKG
4th Edition
ISBN: 9781260195439
Author: Hoefnagels
Publisher: MCG
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Chapter 9, Problem 2MCQ
Meiosis explains why
- a. you inherited half of your DNA from each of your parents.
- b. the sister chromatids in a chromosome are identical to each other.
- c. each of your somatic cells contains the same DNA.
- d. zygotes contain half as much DNA as somatic cells.
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X and Y chromosomes are not homologs, but in meiosis they do pair and segregate in XY organisms to create 50% haploid gametes with an X chromosome and 50% haploid gametes with a Y chromosome. How is pairing achieved?
a. Since all other homologous chromosomes pair, the remaining two chromosomes pair by default.
b Pairing proteins are capable of binding to different genes on the X and Y chromosomes, which allows them to pair.
c. None of the statements is correct.
d. They don't actually pair. Random segregation generally ensures the X and Y chromosomes separate.
e.Pseudoautosomal regions that are homologous exist at the tips of both the X and Y chromosomes, and they allow pairing.
A) Hoe many cells are produced by the end of meiosis II?
B) Are the cells produced at the end of meiosis II haploid or diploid?
C) Are the chromosomes of the four final meiotic products replicated or nonreplicated?
A. In the beginning of meiosis II, each chromosome is duplicated and attached. These chromosomes are called? _______
B. In meiosis, the process of homologous chromosomes lining up together side-by-side is called ___________
Chapter 9 Solutions
BIOLOGY CONCEPT&INVERTIGATIO PKG
Ch. 9.1 - Prob. 1MCCh. 9.1 - How can asexually reproducing organisms acquire...Ch. 9.1 - Prob. 3MCCh. 9.2 - Prob. 1MCCh. 9.2 - Review figure 7.8, which shows that a chromosome...Ch. 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 - How can deletions, duplications, inversions, and...Ch. 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 - Meiosis explains why a. you inherited half of your...Ch. 9 - Prob. 3MCQCh. 9 - Prob. 4MCQCh. 9 - Prob. 5MCQCh. 9 - Prob. 6MCQCh. 9 - Explain why evolution often selects traits that...Ch. 9 - Describe a situation in which asexual reproduction...Ch. 9 - Sketch the relationships among mitosis, meiosis,...Ch. 9 - Prob. 4WIOCh. 9 - How are the members of a homologous pair similar...Ch. 9 - Prob. 6WIOCh. 9 - Draw all possible metaphase I chromosomal...Ch. 9 - In some animals, females can reproduce by...Ch. 9 - List examples of abnormalities in chromosome...Ch. 9 - Prob. 10WIOCh. 9 - Prob. 11WIOCh. 9 - Prob. 12WIOCh. 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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- A human cell that has gone through the second division of meiosis will contain how many chromosomes?arrow_forwardExplain why the daughter cells produced by meiosis NEED to be genetically different from each other, whereas the daughter cells produced by mitosis NEED to be identical.arrow_forwardimagine a giraffe whose diploid is 30. A)Under what circumstances would the giraffe go through a process of meiosis? . b) what will be the final result of this meiosis for the giraffe (# of cells + # of chromosomes/cells)arrow_forward
- What is the fundamental difference between mitosis and meiosis? A. DNA is replicated twice in meiosis, but only once in mitosis. B. The number of DNA molecules per cell nucleus is cut in half in meiosis but remains constant in mitosis. C. The number of chromosomes doubles in meiosis, whereas it stays the same in mitosis. D. Mitosis involves two cell divisions, whereas meiosis only involves one.arrow_forwardWhen does DNA replication occur during meiosis? a. during telophase b. during prophase I c. during anaphase and telophase d. during interphase before meiosis I beginsarrow_forwardHow do cells after meiosis compare with cells that are in the prophase of meiosis I?A) The cells have half the number of chromosomes and one-fourth the amount of DNA.B) The cells have the same number of chromosomes and half the amount of DNA.C) The cells have half the number of chromosomes and half the amount of DNA.D) The cells have half the amount of cytoplasm and twice the amount of DNA.arrow_forward
- In human spermatogenesis, mitosis of a stem cell gives rise to one cell that remains a stem cell and one cell that becomes a spermatogonium. (a) Draw four rounds of mitosis for a stem cell, and label the daughter cells. (b) For one spermatogonium, draw the cells it would produce from one round of mitosis followed by meiosis. Label the cells, and label mitosis and meiosis. (c) Explain what would happen if stem cells divided like spermatogonia.arrow_forwardExplain how meiosis is able to produce cells with a haploid number of chromosomes and explain exactly what happens in meiosis how the chromosome number becomes haploid; and how meiosis differs from mitosis.arrow_forwardimagine a giraffe whose diploid is 30. A) what # of chromosomes will be present in a somatic cell at prophase of mitosis? B) what will be the # of chromosomes present in a somatic cell at prophase 2 of meiosis?arrow_forward
- If meiosis produce haploid cells, how is the diploid numberrestored for those organisms that spend most of their life cycle in the diploid state? a. DNA replication b. reverse transcription c. synapsis d. fertilizationarrow_forwardAt the end of meiosis in humans, four gametes are produced that are: A. Genetically identical to each other and to the parent cell B. Genetically identical to each other but genetically different from the parent cell C. Genetically different from each other and the parent cell D. Genetically identical to the parent cell from different from each otherarrow_forwardA 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?arrow_forward
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