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WEEK 9-HW - Chapter 12-13

Course

Pre-Calculus (MAT-261)

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Students shared 39 documents in this course
Academic year: 2020/2021
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Grand Canyon University

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Chapter 12:

Mitosis: For each statement, decide if the event occurs in: (A)Interphase (B) Prophase (C) Metaphase (D) Anaphase (E) Telophase (B) 1. Chromosomes first become visible as sister chromatids (D) 2. Sister chromatids separate into individual chromosomes (B) 3. Mitotic spindle begins to migrate toward opposite poles of the cell (E) 4. Nuclear envelope begins to reform (C) 5. Sister chromatids line up in the middle of the cell (A) 6. DNA replicates (A) 7. Cell spends to most time in this phase (B) 8. Microtubules are connected to the kinetochore of the sister chromatids (A) 9. Includes a growth phase (B) 10. Division of 2 identical daughter cells (C) 11. Centrosomes are at opposite poles of the cell

A, F, E, D, B, C

  1. A shallow groove in the cell known as a(n) cleavage furrow indicates that cytokinesis has begun.

  2. A drug is known to inhibit the formation of the cell plate during cytokinesis. Would this drug affect human cells? Briefly explain your answer. (CRITICAL THINKING) No, because human cells do not have a cell plate.

  3. Please fill in the table below Asexual Reproduction Sexual Reproduction Requires and egg and Sperm

X

Requires one parent X Produces Genetically identical offspring

X

Produces genetically different offspring.

X

CRITICAL THINKING

  1. You are observing a line of rat cells and see that they repeatedly make mistakes in the cell cycle by going through the G 2 checkpoint too early. This could be due to a

A with expression of a cyclin. B. misplaced MPF. C. defective chromosome. D. misfolded centromere protein.

  1. If you used a very fine glass needle to pull one chromosome away from the metaphase plate during metaphase, which checkpoint would not be passed until this was corrected? A. G 1 checkpoint B. G 2 checkpoint C checkpoint D. S checkpoint E. any checkpoint

4. Which statement comparing cancer cells and normal somatic cells would lose points on a test? A. Cancer cells often deactivate their apoptosis systems. B. Cancer cells are not as sensitive to contact inhibition. C. The cell cycle often proceeds faster in cancer cells. D. Cancer cells are more mobile and less dependent on anchorage. E. Cancer cells have more effective DNA repair activities.

  1. Refer to the drawings of a single pair of homologous chromosomes in Figure 13 as they might appear during various stages of either mitosis or meiosis.

Figure 13.

Which diagram represents anaphase I of meiosis? A. I B. II C. IV D. V E. VI

  1. Based on these data, how much DNA is present in a gamete of Saccharomyces cerevisiae?

a) 12 fg b) 24 fg c) 40 fg d) 48 fg

  1. The mosquito Aedes aegypti has a karyotype of 2 n = 6. Which diagram shows this?

D

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WEEK 9-HW - Chapter 12-13

Course: Pre-Calculus (MAT-261)

39 Documents
Students shared 39 documents in this course

University: Grand Canyon University

Was this document helpful?
Chapter 12:
Mitosis: For each statement, decide if the event occurs in:
(A)Interphase (B) Prophase (C) Metaphase (D) Anaphase (E) Telophase
(B) 1. Chromosomes first become visible as sister chromatids
(D) 2. Sister chromatids separate into individual chromosomes
(B) 3. Mitotic spindle begins to migrate toward opposite poles of the cell
(E) 4. Nuclear envelope begins to reform
(C) 5. Sister chromatids line up in the middle of the cell
(A) 6. DNA replicates
(A) 7. Cell spends to most time in this phase
(B) 8. Microtubules are connected to the kinetochore of the sister chromatids
(A) 9. Includes a growth phase
(B) 10. Division of 2 identical daughter cells
(C) 11. Centrosomes are at opposite poles of the cell
A, F, E, D, B, C
12. A shallow groove in the cell known as a(n) cleavage furrow indicates that cytokinesis has
begun.
13. A drug is known to inhibit the formation of the cell plate during cytokinesis. Would this drug
affect human cells? Briefly explain your answer. (CRITICAL THINKING)
No, because human cells do not have a cell plate.

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