Cell Reproduction

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Slide 1

Cell Reproduction

Prokaryotes Bacteria

Eukaryotes Plants & animals

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Prokaryotes

Lack a nucleus

Have a single chromosome

Reproduce by binary fission

Include bacteria

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Steps in Binary Fission

Used by bacteria

Cells increase their cell mass slightly

DNA & cell components are replicated

Each cell divides into 2 daughter cells

Slide 4

Binary Fission of Bacterial Cell

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E. Coli Dividing by Binary Fission

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Eukaryotes

Contain a nucleus & membrane bound organelles

Asexually reproduce cells by mitosis

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Cell Cycle

Stages in growth & division

G1 Phase

S Phase

G2 Phase

M Phase

Cytokinesis

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G1 Phase

First growth stage

Cell increases in size

Cell prepares to copy its DNA

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Synthesis Phase

Copying of all of DNA’s instructions

Chromosomes duplicated

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G2 Phase

Time between DNA synthesis & mitosis

Cell continues growing

Needed proteins produced

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M Phase

Cell growth & protein production stop

Cell’s energy used to make 2 daughter cells

Called mitosis or karyokinesis (nuclear division)

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Life Cycle of a Cell

Mitosis is a cycle with no beginning or end.

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Interphase – Resting Stage

Cells carrying on normal activities

Chromosomes aren’t visible

Cell metabolism is occurring

Occurs before mitosis

Slide 14

Interphase

Slide 15

Stages of Mitosis

Prophase