Cell Division

living things) grow because your cells get bigger and your

number of cells gets larger.
A single cell divides into two cells.
Two cells divide into four, etc.

Cells must also divide because old cells die and need new cells to replace them!

division that eukaryotic cells undergo.
Prokaryotic cells undergo binary fission

Divided into

three main stages:
Interphase – cell grows into its mature size, makes a copy of its DNA, and prepares for division.
Mitosis – one copy of the DNA is distributed into each of its daughter cells
Cytokinesis – the cytoplasm divides and organelles are distributed into the two new cells

the stage that the cell is in for most of

its life!

a gamete) have 23 pairs of chromosomes. – one from

mom and one from dad. These are called homologous chromosomes.

“X”
Each chromosome is made up of two identical sister chromatids

attached by a centromere
This is “created” in S phase of interphase

the structures it needs to carry out its functions

Think of

this phase as the cell just living its normal life.

(replication)
This happens because the new cell needs all of the

directions for its function and survival.

Think of this phase as placing the DNA on a copy machine.

needed for cell division

cell prepares to split into two cells

This allows the cell’s

genetic material to pass into the new cells
The resulting daughter cells are genetically identical!!

sister chromatids

cell
They line up in the middle of the cell

the opposite ends of the cell

cell and begin to unravel
New nucleus begins to form

daughter cells with identical nuclei