Cell Reproduction

Mitosis and Binary Fission

Three Schem

es

Major Events in Mitosis

Vocabulary• Mitosis = division of the cell nucleus

and its contents• Cytokinesis = the division of cell

cytoplasm into two identical daughter cells

• Chromatin = the combination of DNA and histone proteins

• Diploid = Two copies of each chromosome, one paternal, one maternal

Chromosomes

in the Larger Scheme

Chromosome Structure

1 – Chromatid

2 – Centromere

3 – Short arm 4 – Long arm

Telomeres

Do not code for genes Keep ends of

chromosomes from sticking to each other

Prevent loss of genes

The Cell Cycle

Prophase

Metaphase

Anaphase

Telophase

Cytokinesis

Mitosis in Onion Root Tip

Binary FissionThe primary method

of reproduction for prokaryotes

Does not require a mate

Is asexual reproduction

Does not increase the variation in a population

Binary FissionCentral growth Apical growth