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Mitosis

Biology 9 - Chapter 8 - Mitosis

QuestionAnswer
Binary Fission Occurs only in prokaryotic cells, has one circular chromosome, then DNA is copied, cell elongates, chromosome separates and cell splits
Cell Cycle (in letters) G1, S, G2, M (which includes IPMATC)
G1 growth, increase in protein supply
S DNA Duplicates
G2 normal functions, prepares to divide, makes more organelles and proteins
Interphase Cell grows, chromatin tightens
Prophase mitotic spindle forms, centrosomes grow and move apart
Prometaphase nuclear envelope broken, microtubules attach to kinnetochore
Metaphase Each chromatid has own kinetochore microtubule, line up on metaphase plate
Anaphase Chromatids separate, cell elongates
Telophase mitotic spindle disappears, nuclear envelope forms, chromatin fiber uncoils
Cytokinesis Cytoplasm splits
Animal Cytokinesis Cleavage furrow is a ring of microfilaments in the cytoskeleton that contracts down the middle and splits cells
3 Control Methods anchorage dependance, density dependent inhibition, growth factors
Anchorage dependance cells need a solid surface in order to divide
Density dependant inhibition cells stop dividing once in contact with other cells
Growth factors chemical protein signals released by cells causing nearby cells to divide
Created by: taylor.ellis
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