Bio2 CH 18 - Chapter 18 Interphase- what happens when a...

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Chapter 18 Interphase- what happens when a cell is at rest G1- growing; organelles are replicating S- synthesis; DNA is replicating G2- preparing for cell division; stays metabolically active but does not divide. Proto Oncogenes - promote healthy cell growth Oncogenes- mutated cells; does not promote healthy cell growth Results of mitosis is diploid- one from mom, one from dad. Taking place in somatic body Diploid cell makes and divides exact copy of its nucleus (DNA) Mitosis used in cell growth and cell repair and occurs in body cells 4 phases 1) Prophase- Condensing and starting to look like a chromosome; centrosomes have duplicated and nuclear envelope is fragmenting. Spindles start to form 2) Metaphase- Chromatid attaches to spindles. Chromosomes line up. 3) Anaphase- Chromatins are spreading apart and are moved to opposite ends of the cell. 4) Telophase- Daughter cells are forming and pinching in. Nuclear envelopes reappear.
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Bio2 CH 18 - Chapter 18 Interphase- what happens when a...

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