2.6. Mitotic phase

Question 1

What 2 stages does the mitotic phase involve?

Answer 1

• mitosis

* cytokinesis

Question 2

What occurs in mitosis?

Answer 2

Nucleus divides

Question 3

What happens in cytokinesis?

Answer 3

Cytoplasm divides and two daughter cells are produced

Question 4

What are the phases of mitosis?

Answer 4

• interphase
• prophase
• metaphase
• anaphase
• telophase

Question 5

What happens during interphase?

Answer 5

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

Question 6

What happens in prophase?

Answer 6

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

Question 7

What happens in metaphase?

Answer 7

• chromosomes line up along the equator

* spindle fibres attach centrioles to chromosomes

Question 8

What happens at the metaphase checkpoint?

Answer 8

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

Question 9

What happens during anaphase?

Answer 9

• centromeres split allowing sister chromatids to separate

* chromatids move toward poles, centromeres first

Question 10

What happens during telophase?

Answer 10

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

Question 11

What happens during cytokinesis?

Answer 11

• cytoplasm divides

* two daughter cells genetically to the parent cell and each other form

Question 12

What is another word for daughter cells being genetically identical?

Answer 12

Clones

Question 13

What does mitosis do?

Answer 13

It increases the cell number for growth and repair

Question 14

What is a chromatid?

Answer 14

Half a chromosome

Question 15

What is the centromere?

Answer 15

The middle of the chromosomes where chromatids join

Question 16

What is mitosis?

Answer 16

Process of cell division in eukaryotic cells

Question 17

What is special about mitosis in animal cells?

Answer 17

• 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

Question 18

What is special about mitosis in plant cells?

Answer 18

• 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

Question 19

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

Answer 19

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

Question 20

Where does mitosis occur in animals?

Answer 20

Tissues and body cells

Question 21

Where does mitosis occur in plant cells?

Answer 21

In meristems