THE CELL CYCLE 2.5 As eukaryotic cells grow and divide, they move through three distinct stages: interphase – cells grow and prepare to divide mitosis.

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THE CELL CYCLE 2.5 As eukaryotic cells grow and divide, they move through three distinct stages: interphase – cells grow and prepare to divide mitosis – cells start to divide cytokinesis – two cells are formed from one Interphase: the cell carries out all normal life activities the DNA is in very long, thin, and invisible strands DNA is copied at end of interphase to get ready for division most of the cell’s life is spent in interphase HowStuffWorks Videos "Interphase: The Resting Stage"

2. Mitosis the DNA doubles, to get ready to be divided there are 4 phases of mitosis Prophase: DNA thickens 2 identical strands of DNA (copied during interphase) called chromosomes chromosome made of 2 identical sister chromatids each chromatid held together by a centromere nuclear membrane disappears YouTube - Mitosis: The Phases, Part 1 of 2, from Thinkwell Biology

PHASES OF CELL DIVISION 2.5

ii) Metaphase iii) Anaphase centrioles move to either side of the cell chromosomes line up in the middle of the cell iii) Anaphase centromere splits and sister chromatids separate now called ‘daughter’ chromosomes spindle fibres from centrioles pull them to opposite sides of the cell

iv) Telophase final stage of mitosis daughter chromosomes stretch out and get thinner nuclear membrane starts to form around each gp of daughter chromosomes cell appears to have 2 nuclei (nucleus)

Cytokinesis cell’s cytoplasm divides cell membrane pinches off splits into 2 new daughter cells each cell is identical to the original parent cell YouTube - Mitosis: The Phases, Part 2 of 2 from Thinkwell Biology

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