2.6. Mitotic phase Flashcards Preview

A Level Biology > 2.6. Mitotic phase > Flashcards

Flashcards in 2.6. Mitotic phase Deck (21):
1

What 2 stages does the mitotic phase involve?

• mitosis
• cytokinesis

2

What occurs in mitosis?

Nucleus divides

3

What happens in cytokinesis?

Cytoplasm divides and two daughter cells are produced

4

What are the phases of mitosis?

• interphase
• prophase
• metaphase
• anaphase
• telophase

5

What happens during interphase?

• the chromatin are not visible
• DNA unraveled and replicated
• organelles replicated
• increase in ATP

6

What happens in prophase?

• chromosomes condense and become visible
• centrioles move to opposite poles of the cell and begin to form spindles
• nucleolus disappears
• breakdown of nuclear membrane

7

What happens in metaphase?

• chromosomes line up along the equator
• spindle fibres attach centrioles to chromosomes

8

What happens at the metaphase checkpoint?

Cell checks that all the chromosomes are attached to the spindle before mitosis can continue

9

What happens during anaphase?

• centromeres split allowing sister chromatids to separate
• chromatids move toward poles, centromeres first

10

What happens during telophase?

• chromatids reach the opposite poles on the spindle
• spindle fibres disperse
• nuclear membranes form

11

What happens during cytokinesis?

• cytoplasm divides
• two daughter cells genetically to the parent cell and each other form

12

What is another word for daughter cells being genetically identical?

Clones

13

What does mitosis do?

It increases the cell number for growth and repair

14

What is a chromatid?

Half a chromosome

15

What is the centromere?

The middle of the chromosomes where chromatids join

16

What is mitosis?

Process of cell division in eukaryotic cells

17

What is special about mitosis in animal cells?

- centrioles involved which form spindles to pull apart chromatids
- cytokinesis- furrow forms increasing indention until 2 cells completely separate
- occurs in tissues throughout the body

18

What is special about mitosis in plant cells?

- no centrioles - spindle fibres form from free microtubules that assemble at one point
- Golgi apparatus sends vesicles filled with polysaccharides to equator region. Vesicles fuse and form cell plate which develops into cell wall separating the daughter cells
- occurs mainly in meristems

19

In animal cells a furrow forms to separate daughter cells what happens in plant?

Vesicles from Golgi apparatus fuse at equator to form cell plate which develops into cell wall

20

Where does mitosis occur in animals?

Tissues and body cells

21

Where does mitosis occur in plant cells?

In meristems

Decks in A Level Biology Class (102):