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Cell Replication (Mitosis # # # # (somatic cells (cell with 46…
Cell Replication
Mitosis
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2 diploids
division of cell nucleus
needed for growth and repair
occurs once
somatic cells
cell with 46 chromosomes
aging
rate of mitosis gets less
cancer
mutation; to much mitosis
asexual reproduction
Meiosis
4 haploids
one useful; three useless
makes gametes (sex cells)
cells with 23 chromosomes
occurs twice
second time really similar to mitosis
homologous chromosomes (one from each parent)
mutation
birth defect
prepares for sexual reproduction
Interphase
Cell copies DNA
longest phase
prepares for mitosis
type of cell cycle but not mitosis
Telophase
4th
two nuclei
cleavage furrow; cell membrane pinches in
nuclear membrane reappears
Cytokinesis
cytoplasm splits
two new cells
type of cell cycle but not mitosis
Anaphase
3rd
spindle fibers pull chromatids apart
Metaphase
2nd
chromosomes line up in Middle
Prophase
Chromatids pair up
1st