BIOLOGY
12th Edition
ISBN: 9781264839698
Author: Raven
Publisher: MCG CUSTOM
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Chapter 11, Problem 5A
Structurally, meiotic cohesins have different components than mitotic cohesions. This leads to the following functional difference:
a. During metaphase I, the sister kinetochores become attached to the same pole.
b. Centromeres remain attached during anaphase I of meiosis.
c. Centromeres remain attached through both divisions.
d. Centromeric cohesins are destroyed at anaphase I, and cohesins along the arms are destroyed at anaphase II.
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Students have asked these similar questions
Consider a diploid organism in which the somatic cell chromosome number is 42. Assume cytokinesis to occur in mid telophase.
A. How many chromosomes at the close of telophase of mitosis?
B. How many chromosomes are expected at metaphase II of meiosis?
2) A. Explain how polyribosomes form.
B. Why might you expect the insertion of 3 DNA base pairs to be less disruptive than th
deletion of a single base pair?
C. Compare and contrast mitosis and meiosis with respect to their genetic outcomes?
D. What are the possible consequences of non-disjunction during cell division?
E. How does meiosis increase genetic diversity in populations?
Using the symbols above:
1. Given: Adult diploid cell (2n = 8)
2. Show the condition of the chromosomes in the following Mitosis phases (illustrate):
a. prophase
b. metaphase
c. anaphase
d. telophase/cytokinesis
Chapter 11 Solutions
BIOLOGY
Ch. 11.1 - Prob. 1LOCh. 11.1 - Prob. 2LOCh. 11.2 - Describe how homologous chromosomes pair during...Ch. 11.2 - Prob. 2LOCh. 11.3 - Prob. 1LOCh. 11.3 - Prob. 2LOCh. 11.3 - Prob. 3LOCh. 11.4 - Prob. 1LOCh. 11.4 - Prob. 2LOCh. 11.4 - Explain the importance of the suppression of...
Ch. 11 - Prob. 1IQCh. 11 - In comparing somatic cells and gametes, somatic...Ch. 11 - What are homologous chromosomes? a. The two halves...Ch. 11 - Chiasmata form a. between homologous chromosomes....Ch. 11 - Crossing over involves each of the following with...Ch. 11 - During anaphase I a. sister chromatids separate...Ch. 11 - At metaphase I the kinetochores of sister...Ch. 11 - What occurs during anaphase of meiosis II? a. The...Ch. 11 - Which of the following does NOT contribute to...Ch. 11 - How does DNA replication differ between mitosis...Ch. 11 - Which of the following is NOT a distinct feature...Ch. 11 - Which phase of meiosis I is most similar to the...Ch. 11 - Structurally, meiotic cohesins have different...Ch. 11 - Prob. 6ACh. 11 - Diagram the process of meiosis for an imaginary...Ch. 11 - Mules are the offspring of the mating of a horse...Ch. 11 - Compare the processes of independent assortment...Ch. 11 - Aneuploid gametes are cells that contain the wrong...
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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
- In an organism with a haploid number of , how many possible combinations of maternal and paternal chromosomes can occur in its gametes? Select one: a. b. c. d.arrow_forwardFor the following events, specify whether they occur during mitosis, meiosis I, or meiosis II:A. Separation of conjoined chromatids within a pair of sisterchromatidsB. Pairing of homologous chromosomesC. Alignment of chromatids along the metaphase plateD. Attachment of sister chromatids to both polesarrow_forwardSeparation of homologous chromosomes during Meiosis I requires: Select one: a. Removing centromere cohesion b. Nondisjunction c. Separase If nondisjunction occurred during Meiosis II: Select one: a. We assume all other meiotic events occurred normally b. All four gametes will be abnormal c. There is a higher risk that a second nondisjunction event occurredarrow_forward
- Humans cells normally have 46 chromosomes (2n). Specify the number of chromosomes present at each of the following stages. In your answers, determine diploid or haploid number of chromosomes and the count the chromatids as chromosomes. For example: anaphase I of meiosis: 46 (2n) = 92 a. metaphase I of meiosis b. metaphase of mitosis c. telophase I of meiosis d. telophase II of meiosisarrow_forwardCucumis sativus (cucumber) is a diploid plant with 7 chromosome pairs. Determine the following as its cell divides by mitosis or meiosis: a. number of centromeres at Metaphase I b. number of univalents at Anaphase I (per pole) c. number of chromatids at Prophase d. chromosome number at Metaphase chromosome number at Telophase I (after cytokinesis) С. е.arrow_forwardDuring meiosis, when crossing-over occurs between two homologous chromosomes, it does not happen at a single point, but rather two points with a stretch of DNA in between. What are the two junction points called?What is the region between the two points called and what is different about this region compared to how double-stranded DNA usually is?If the region described in b.) is located within a gene and the two homologues have different alleles of this gene, what might happen that is a direct violation of Mendel’s first law? (Describe the process with 2-3 sentences of detail.)arrow_forward
- a. What type of cell division mitosis, meiosis I or meiosis II is shown in this figure? b. What is the diploid number of this organism? c. Provide labels for (i) and (ii)arrow_forwardWhich of the following statements are true regarding homologous pairs of chromosomes? Select all that apply. A. They are the same size B. Their prescence indicates a cell is a diploid C. They are identical copies of one another D. One of the homologous chromosomes in a set is synthesized during S phase E. They line up next to each other during metaphase I of meiosis F. They are separated in anaphase I of meiosisarrow_forwardWhich of the following statements are True? There may be more than one answer. Select one or more: a. Mitosis results in 2 haploid cells O b. If a parent cell with 10 chromosomes undergoes mitosis, each offspring cell will have 10 chromosomes O c. At the start of meiosis, a human cell will have 46 chromosomes and 92 chromatids d. The purpose of mitosis is the production of gametes e. In Meiosis, crossing over occurs during Meiosis II f. Meiosis only occurs in the testes and ovariesarrow_forward
- Consider a diploid cell that contains three pairs of chromosomes designated AA, BB, CC. each pair contains a maternal and a paternal member (eg. Am and AP, etc). Using these designations, answer the ff. questions: (You can draw your answers but label chromosomes) a. In mitosis, what chromatid combinations will be present during metaphase? What combinations will be present at each pole at the completion of anaphase? b. During meiosis I, draw all possible alignments of chromatids at metaphase. C. Assume that during meiosis I, nondisjunction of the C chromosomes occur. What types of gametes will they form and what is the chromosome number of the resultant gametes?arrow_forwardShown below are photomicrographs of Rhoeo tradescantia cells undergoing meiosis. Answer the following question for each of the photomicrograph: a. Identify the cytogenetic abnormality observed (ex. ring, chain, laggard, bridge) b. Identify the meiotic stage in which these aberrations are observed (as shown in the photomicrograph) c. Explain how these aberrations are formed d. Will this result to sterile or fertile gametes? Explain.arrow_forwardDuring metaphase I of meiosis, tetrads align along the metaphase plate independently of each other. Therefore, there is a random “shuffle” of maternal and paternal chromosomes in the resulting gametes.The following diagram demonstrates how this works in a diploid cell with four chromosomes . Because there are two pairs of chromosomes and each pair can align in one of two ways during metaphase I, the number of possible variations in the gametes produced is , or .For an organism that is , there are three pairs of chromosomes, so the number of possible variations in the gametes produced due to independent assortment in metaphase I is , or . In an organism with a haploid number of , how many possible combinations of maternal and paternal chromosomes can occur in its gametes? Select one: a. 72=49 b. 27=128 c.17=1 d. 214=16 384arrow_forward
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