BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 11, Problem 1S
Diagram the process of meiosis for an imaginary cell with six chromosomes in a diploid cell.
a. How many homologous pairs are present in this cell? Create a drawing that distinguishes between homologous pairs.
b. Label each homologue to indicate whether it is maternal (M) or paternal (P).
c. Draw a new cell showing how these chromosomes would arrange themselves during metaphase of meiosis I. Do all the maternal homologues have to line up on the same side of the cell?
d. How would this picture differ if you were diagramming anaphase of meiosis II?
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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?
If a diploid organism has 14 chromosomes (2n=14)
a. How many chromosomes will its gametes have?
b. After meiosis I during gamete formation, how many chromosomes are in each daughter cell?
c. After meiosis I during gamete formation, how many chromatids are in each daughter cell?
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?
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
- During which phase of meiosis a. do homologues separate? b. do tetrads line up on metaphase plate? c. does crossing over occur? d. do sister chromatids seperate?arrow_forwardAn organism has a diploid number of 20 in a primary oocyte. a. How many tetrads are present in the meiotic prophase l? b. How many dyads are present in the meiotic prophase II ? c. How many monads migrate to each pole during meiotic anaphase II ?arrow_forwardThe given picture is a homologous chromosome pair that shows this behavior pachytene: a. what is the specific type of chromosomal aberrations shown in the figure? b. Draw how these chromosomes behave during Anaphase I. c. Provide all the gametes that will be formed after meiosis II and identify whether those gamete will be fertile or sterile.arrow_forward
- Which 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_forwardConsider a diploid cell that has 2n = 4 chromosomes: one pair of metacentric chromosomes and one pair of acrocentric chromosomes. Suppose that this cell undergoes nondisjunction, giving rise to an autotriploid cell (3n). The triploid cell then undergoes meiosis. Draw the different types of gametes that could result from meiosis in the triploid cell, showing the chromosomes present in each type. To distinguish between the different metacentric and acrocentric chromosomes, use a different color to draw each metacentric chromosome; similarly, use a different color to draw each acrocentric chromosome.arrow_forwardGerm cells are specialized cells that develop into gametes. Gametes are produced through the process of meiosis. If the haploid number for monkeys is 27 chromosomes, how many chromosomes does a cell undergoing division have at each of the following phases? Select the row that correctly shows the number of chromosomes at each phase. Select one: a. G2 of Interphase Mitotic Metaphase Meiotic Metaphase I Meiotic Metaphase II 27 54 54 27 b. G2 of Interphase Mitotic Metaphase Meiotic Metaphase I Meiotic Metaphase II 54 27 27 27 c. G2 of Interphase Mitotic Metaphase Meiotic Metaphase I Meiotic Metaphase II 54 54 27 27 d. G2 of Interphase Mitotic Metaphase Meiotic Metaphase I Meiotic Metaphase II 54 54 54 27arrow_forward
- Consider a diploid cell that has 2 n = 4 chromosomes: one pair of metacentric chromosomes and one pair of acrocentric chromosomes. Suppose that this cell undergoes nondisjunction, giving rise to an autotriploid cell (3 n). The triploid cell then undergoes meiosis. Draw the different types of gametes that could result from meiosis in the triploid cell, showing the chromosomes present in each type. To distinguish between the different metacentric and acrocentric chromosomes, use a different color to draw each metacentric chromosome; similarly, use a different color to draw each acrocentric chromosome.arrow_forwardConsider a diploid cell that has 2 n = 4 chromosomes: one pair of metacentric chromosomes and one pair of acrocentric chromosomes. Suppose that this cell undergoes nondisjunction, giving rise to an autotriploid cell (3 n). The triploid cell then undergoes meiosis. Draw the different types of gametes that could result from meiosis in the triploid cell, showing the chromosomes present in each type. To distinguish between the different metacentric and acrocentricchromosomes, use a different color to draw each metacentric chromosome; similarly, use a different color to draw each acrocentric chromosome.arrow_forwarda. 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_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_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_forwardIn a zygote that begins with a complement of two homologous chromosomes pairs, A and a, and B and b: a. What chromosome compliments would you find in each somatic cells during growth? b. What combinations chromosomes would you expect to find in the gametes if the individual becomes an adult?arrow_forward
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