2.2 Cells Arise From Other Cells

Question 1

What is mitosis for?

Answer 1

Growth
Replacement of cells
Reproduction of single cells ex organisms

Question 2

What does mitosis produce?

Answer 2

2 genetically identical daughter cells from one genetically identical parent cell

Question 3

Interphase

Answer 3

90% of the cell cycle is during interphase
DNA replication occurs
Produced 2 sister chromatids joined by a centromere

Question 4

Prophase

Answer 4

Nucleolus disappears and nuclear envelope breaks down
Chromosomes first become visible because they condense
Centrioles move to opposite poles of the cell
Spindle fibers form from the centrioles forming a spindle apparatus

Question 5

Metaphase

Answer 5

Spindle fibres attach to the centromeres between the sister chromatids
The chromosomes are pulled along the spindle apparatus, alining themselves along the equator of the cell

Question 6

Anaphase

Answer 6

The centromeres divide

The spindle fibres contract, pulling the chromotides to opposite poles of the cell

Question 7

Telophase

Answer 7

The cytoplasm divides - cytokinesis
The nucleolus reappears and the nuclear envelop reforms
Spindle fibers disintegrate

Question 8

What cells undergo mitosis?

Answer 8

All of them except gametes