Cell cycle

• Cell cycle is the birth, growth, reproductive, death of cell.
• 2 main stages: interplase: 90% and division of cell: 10% mitosis and cytokinesis
• Somatic cells are non reproductive cells that undergo mitosis.
• Cells reproduce by mitosis to grow, repair, and replace.
• Interphase: happens before mitosis. It is the period cell divsion where a cell grows, carries life functions, and prepares for division.
• 3 detailed stages of interphase are G1: first growth- Carries functions, and prepares. S:synthesis-DNA REPLICATION. G2- second growth: grows, carries life functions and prepares.
• Prophase: first stage of mitosis. DNA condenses, Chromatin forms chromosomes. Chromatin is a mixture of DNA and proteins forming chromosomes. Nuclear Membrane dissolves.
• Metaphase is the second stage of mitosis where chromosomes line up at center. Spindle fibers attach to centromere of chromosome.
• Anaphase is the third stage of mitosis where sister chromatids separate from each other. Centromeres split apart and spindle fibers pull them towards opposite poles.
• Telophase is the fourth stage of mitosis where new nuclear membranes form around chromosomes. Chromosomes uncoil into chromatin again. Cytokinesis occurs when cytoplasm splits into two daughter cells.
• Cytokinesis is the final step of mitosis where cytoplasm splits into two daughter cells.