Lab quiz # 5 Flashcards


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1

During which part of the cell cycle does dna replication occur ?

Interphase (s phase)

2

During what stages of mitosis are chromosomes composed of two chromatids ?

(S phase) of interphase, prophase, anaphase

3

During what stages of mitosis are chromosomes single structures composed of one chromatid?

Anaphase and telophase

4

How does cytokinesis differ in plant and animal cells?

Plant- cell plate

animal - cleavage

5

Most cells spend the longest amount of time in ?

Interphase

6

Mitosis

Series of events result in equal distribution of the chromosomes that carry the genetic information to the two new cells

7

Mitosis

Cloning

8

meiosis

Only make eggs

9

mitosis has

46 parent cells

46 daughter cells -----&--- 46 daughter cells

10

meiosis has

46 parent cells

Meiosis I -46 & 46

Meiosis II- 23,23 & 23, 23

11

describe the main event happening in any cell undergoing metaphase?

Spindle is binding to chromosomes, aligning them in cell equator.

12

why is meiosis necessary in sexually reproducing organisms?

meiosis cuts the chromosomes numbers in half; 23 chromosomes

13

Synapis occurs ?

meiosis I (prophase I)

14

Crossing over occurs?

Prophase I

15

Reduction from diploid and haploid occurs ?

Anaphase II

16

Separation of chromosomes occurs?

Anaphase II

17

stages of the cell cycle in Mitosis ?

Prophase, metaphase, anaphase, telophase

18

Cytokinesis occurs ?

telophase

19

Majority of the life of a cell is spent in a non dividing condition known as?

interphase

20
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interphase

The DNA duplicates during interphase to prepare for mitosis (the next four phases that lead up to and include nuclear division). Chromosomes are not clearly discerned in the nucleus, although a dark spot called the nucleolus may be visible.

21
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prophase

Chromatin in the nucleus begins to condense and becomes visible in the light microscope as chromosomes.

22
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Metaphase

Spindle fibers align the chromosomes along the middle of the cell nucleus. This line is referred to as the metaphase plate. This organization helps to ensure that in the next phase, when the chromosomes are separated, each new nucleus will receive one copy of each chromosome.

23
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Anaphase

The paired chromosomes separate at the kinetochores and move to opposite sides of the cell. Motion results from a combination of kinetochore movement along the spindle microtubules and through the physical interaction of polar microtubules.

24
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telophase

New membranes form around the daughter nuclei while the chromosomes disperse and are no longer visible under the light microscope. Cytokinesis or the partitioning of the cell may also begin during this stage.