3.14

Question 1

Previous stage to mitosis

Answer 1

Interphase

Question 2

Mitosis phases

Answer 2

1) Prophase
2) Metaphase
3) Anaphase
4) Telophase
5) Cytokinesis

Question 3

Describe the first phase

Answer 3

PROPHASE

Genetic material replicates to produce exact copies of the original chromosomes.

Question 4

Describe the second phase

Answer 4

METAPHASE
Nuclear membrane has broken down. Centrioles have formed between them a spindle (set of microtubules). Chromatids (chromosones) line up along the metaphase plate (equator).

Question 5

Describe the third phase

Answer 5

ANAPHASE
Centromeres split so two identical linked chromatids become new separate chromosomes. Chromatids have been separated to opposite sides of the cell, moved by microtubules of the spindle.

Question 6

Describe the fourth phase

Answer 6

TELOPHASE
Spindle fibres break down and nuclear envelopes (which is visible) form around the two sets of chromosomes, which uncoil and become invisible.