Question 3 1 point Cell cycle progression is controlled by t

Question 3 (1 point)

Cell cycle progression is controlled by the rhythmic accumulation and degradation of:

Question 3 options:

Cyclins

Cyclin-dependent kinases (Cdks)

Both

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Question 4 (1 point)

During metaphase of mitosis:

Question 4 options:

DNA is replicated

Sister chromatids line up together on the equator

DNA is uncoiled and in use

Spindle fibers are absent

Preparation for cell division begins

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Question 5 (1 point)

During cell division, cytokinesis is completed by the end of:

Question 5 options:

prophase

anaphase

metaphase

telophase

interphase

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Question 6 (1 point)

Crossing over or recombination most frequently occurs during:

Question 6 options:

prophase I of meiosis

metaphase II of meiosis

prophase of mitosis

telophase of mitosis

prophase II of meiosis

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Question 7 (1 point)

In eukaryotes, chromosomes are duplicated during which stage of the cell cycle?

Question 7 options:

G1

S

G2

M

C1

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Question 8 (1 point)

Which of the following events is not common to both mitosis and meiosis?

Question 8 options:

Sister chromatids separate

Homologous chromosomes pair and separate

Nuclear membrane breaks down

cytokinesis

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Question 9 (1 point)

At the conclusion of mitosis of a diploid cell, there are _____ haploid cell products produced.

Question 9 options:

0

1

2

3

4

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Question 10 (1 point)

A diploid heterozygous cell with the genotype Bb undergoes meiosis and no crossing over occurs.

At the end of meiosis I, cytokinesis occurs leaving two products. What are the resulting product genotypes of meiosis I?

Question 10 options:

Bb and Bb

BB and BB

bb and bb

BB and bb

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	Cyclins
	Cyclin-dependent kinases (Cdks)
	Both

Solution

3. cyclin dependent kinases- activity increases and decreases according to the cyclin attached to it.

4. metaphase is the third phase and the chromosomes divides into two cells, answer is --Sister chromatids line up together on the equator.

5. Telophase- forms two separate nucleus with equal number of chromosomes and nucleolus reappears.

6. prophase I of meiosis- homologous chromosomes line up together and intersect a portion of chromatid with the other one.

7. S phase- DNA replicates and sister chromatids are formed

8. Homologous chromosomes pair and separate- this occurs in meiosis and not in mitosis

9. 2diploid cells are produced

10. BB and bb- homologous chromosomes separates but the sister chromatids are same