Mitosis and Cell Division

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Presentation transcript:

Mitosis and Cell Division

Cell Cycle-What is it? Life cycle of the cell The cell cycle begins when the cell is formed and ends when the cell divides and forms new cells.

What is DNA-organized? DNA is the hereditary material that controls all cell activities. Organized in structures called chromosomes.

Making more prokaryotes Prokaryotes – have no nucleus Have ribosomes and circular ring of DNA Divide by binary fission – “splitting in two parts” http://www.classzone.com/books/hs/ca/sc/bio_07/animated_biology/bio_ch05_0149_ab_fission.html

Eukaryotic cells and their DNA Eukaryotic cells contain more DNA than prokaryotic cells More complex eukaryotic cells don’t necessarily have more chromosomes than less complex Fruit flies – 8 chromosomes, potatoes – 48 chromosomes, humans – 46 chromosomes Homologous chromosomes – pairs of similar chromosomes

Making more eukaryotic cells Interphase Mitosis Cytokinesis

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