Term

Describe what happens in each stage of interphase.

Definition

G1: - cell grows - organelles, proteins, and ATP are synthesized S: - DNA replicates - each chromosome is copied to form two identical sister chromatids G2: - more protein synthesis - ATP stores increase - DNA is checked and repaired - Cell prepares for mitosis

Term

What is G0 and when does a cell enter it?

Definition

- when a cell stops dividing enters when: - differentiated - DNA is damaged

Term

Describe the process of mitosis.

Definition

Prophase: - chromosomes condense and become visible - nuclear envelope breaks down - centrioles move to opposite sides of the cell - spindle structures form Metaphase: - chromosomes line up at the equator - spindle fibres attach to chromosomes at the centromere Anaphase: - sister chromatids separate at the centromere - spindle fibres pull each one to opposite sides of the cell, forming two sets of chromosomes Telophase: - chromosomes reached the poles and decondense - nuclear envelope reforms around each set of chromosomes - spindle fibres break down