LIFE 210 Lecture Notes - Eukaryote, S Phase, Cell Cycle
Document Summary
Each cell cycle produces two genetically identical daughter cells. The only way to make a new cell is to duplicate a cell that already exists. Cell cycle: the cycle of cell growth, duplication of its contents, and division. The most fundamental task is the passing of its genetic information to the next generation of cells. Chromosome duplication occurs during s phase, ~12 hours in mammalian cell. Chromosome segregation and cell division occur in m phase, 1 hour. M phase nuclear division + cytoplasmic division. The stages of nuclear division (mitosis) and cell division (cytokinesis) In prophase dna molecules are disentangled and condensed into sister chromatids. Nuclear envelope disassembly sister chromatids attach to the spindle (giant array of microtubules) Anaphase: sister chromatids align at the spindle equator and separate. The eukaryote cell cycle is divided into four phases. Time to double the mass of proteins and organelles > time to duplicate chromosomes and divide.
