Cell Cycle and Cell Division — Part 1: The cell cycle and mitosis: visual lesson, ICSE Class 10 Biology (Science Paper 3)

Lesson

Cell Cycle, Cell Division and Chromosomes

Part 1 — how a cell grows, copies its DNA and divides into two identical cells.

In this lesson you will

Describe the events of the G1, S and G2 phases and draw the cell cycle
Identify the stages of mitosis from a diagram or slide and describe what happens to the chromosomes
Distinguish cytokinesis in plant cells (cell plate) from animal cells (furrowing)

Diagram

The cell cycle

The cell cycle is the sequence of events from the formation of a cell to its own division. It has interphase (G1, S, G2) and the M phase (mitosis and cytokinesis).

Concept

What happens in interphase

Table of the three phases of interphase and their main events
Phase	Main events
G1 (first gap)	Cell grows; makes proteins and new organelles
S (synthesis)	DNA is copied; each chromosome now has two chromatids
G2 (second gap)	Cell makes proteins for the spindle and gets ready to divide

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