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BIO130H1 Chapter : Pg. 1092-1094.docx

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School
UTSG
Department
Biology
Course
BIO130H1
Professor
John Coleman

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BIO130H1 Full Course Notes
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BIO130H1 Full Course Notes
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Document Summary

Occurs between anaphase and ends at telophase. The change is visible through cleavage furrow; which spreads until the cell divides into two. The structure of the cell furrow is created by a contractile ring; dynamic assembly of actin filaments, myosin ii. Cytokinesis occurs in four steps: initiation, contraction, membrane insertions and completions. Actin and myosin ii in the contractile ring generate the force for cytokinesis. Actin and myosin ii begin to accumulate into contractile ring. The contractile ring depends on formin protein.

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Related Questions

How do the different phases of mitosis overcome some of the problems associated with the cell division? Hint: interphase, prophase, prometaphase, metaphase, anaphase, telophase, cytokinesis.

Select all of the following statements that typically occur during anaphase:

_____________________

Sister chromatids are copied and separate into separate chromosomes.
The non-kinetochore microtubules elongate.
Condensin proteins assist with separation of the chromatids.
The kinetochore microtubules shorten.
Cohesin proteins are degraded.

Cytokinesis of animal cells is characterized by the appearance of a cleavage furrow. When does the cleavage furrow first start to appear?

_____________________

G1 Interphase
Anaphase
Telophase
G2 Interphase
Prophase
Metaphase

a. What is the purpose of mitosis? b. Identify morphological changes during mitosis in the following cell structures: chromatin, chromosomes, chromatids, nucleolus, nuclear membrane, centrioles, and spindle. c. Explain how cytokinesis occurs in animal cells, compared to how it occurs in plant cells. d. What is the involvement of microtubules and microfilaments in moving chromosomes during mitosis and in forming a cleavage furrow during cytokinesis?