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15 Cards in this Set
- Front
- Back
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What is the difference between cell division between unicellular and multicellular organisms?
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for unicellular organisms, cell division is a means of reproduction
for multicellular organisms, it is a method of growth, development, and replacement of warn out cells |
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what is mitosis?
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division and distribution of the cell's DNA to its two daughter cells such that each cell recieves a complete copy of the original genome
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What are the stages of mitosis?`
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interphase
prophase metaphase anaphase telophase cytokinesis |
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what occurs during interphase?
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each chromosome is replicated, after which the chromosomes consist of two identical sister chromatids held together by a centromere
individual chromosomes not visible DNA is uncoiled and called chromatin |
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What are the four parts of interphase?
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G1
S G2 M |
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what occurs during the G1 phase of interphase?
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initiates interphase
active growth phase cell increases in size and synthesizes proteins length determines length of whole cycle |
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what occurs during the S phase of interphase?`
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DNA synthesis
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what occurs during the G2 phase of interphase?
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cell prepares to divide
cell grows and synthesizes proteins |
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What is the final phase of interphase?
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mitosis
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what occurs during prophase?
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chromosomes condense
centriole pairs separates and move towards the opposite poles of the cell spindle apparatus forms between the centriole pairs nuclear membrane dissolves, allowing spindle fibers to interact with the chromosomes |
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what occurs during metaphase?
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fibers of the spindle apparatus attach to each chromatid at the centromere
chromosomes align at the center of the cell |
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what is the metaphase plate
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center of the cell during mitosis
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what occurs during anaphase?
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centromeres split leaving each chromatid with its own centromere, separating sister chromatids
sister chromatids pulled to opposite poles of cell |
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what occurs during telophase?
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spindle apparatus disappears
nuclear membranes reform chromosomes uncoil |
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what occurs during cytokinesis?
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end of telophase
cytoplasm divides into two daughter cells |
