Chapter 12_ The Cell Cycle.docx - Chromosomes ● Cell cycle:...

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ChromosomesCell cycle:life of a cell from the time it is first formed to its own divisionMulticellular organisms divide for growth, reproduction, and tissue renewalDNA condenses to form chromatin, which condenses to chromosomesSister Chromatids:joined copies of the original chromosomeCentromere:Region made of repetitive sequences where chromatids attachIn mitosis, sister chromatids split to double the number of chromosomesG1, S, G2, MMitosisG2: nuclear envelope, nucleolus, 2 centrosomesProphase: chromosomes condense, nucleoli disappears, spindle forms, centrosomes migratePrometaphase: nuclear envelope fragments, kinetochores form at centromeres, microtubulesattachMetaphase: chromosomes align, centrosomes at opposite polesMitotic spindle from centrosome arranges chromatids at metaphase plateAnaphase: cohesin proteins are cleaved, chromatids separateTelophase: daughter nuclei form, nucleoli reappearCytokinesis: division of cytoplasm
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Term
Spring
Professor
Jag
Tags
Cell Cycle, Mitosis, Sister chromatids

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