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10th Biology 8.2


CHROMOSOME DNA in the nucleus of the cell; contains all of the directions that a cell needs to survive for most of a cell’s life, chromosomes exist as chromatin
CHROMATIN chromatin: long strands of DNA wrapped around proteins
CELL CYCLE The Cell Cycle: sequence of growth and division of a cell
INTERPHASE G1 phase: cell grows S phase: Chromosomes copy themselves and form sister chromatids (so that each new cell will have all the chromosomes the original cell had) G2 phase: cell grows mitosis, or cell division, occurs
MITOSIS cell division that produces 2 daughter cells that are identical to the original cell
PROPHASE Nuclear membrane falls apart chromasomes condense centrioles move to opposite sides of the cell and start to form spindle fibers
SISTER CHROMATIDS daughter cells that are identical to the original cell1
CENTROMERE the region of a chromosome to which the microtubules of the spindle attach, via the kinetochore, during cell division.
CENTRIOLE a minute cylindrical organelle near the nucleus in animal cells, occurring in pairs and involved in the development of spindle fibers in cell division.
SPINDLE slender mass of microtubules formed when a cell divides. At metaphase, the chromosomes become attached to it by their centromeres before being pulled toward its ends.
METAPHASE the second stage of cell division, between prophase and anaphase, during which the chromosomes become attached to the spindle fibers.
TELOPHASE Telophase:chromosomes decondense spindle fibers break down new nuclear membrane forms around each set of chromosomes
CYTOKINESIS Cytokinesis: cytoplasm divides, forming 2 new cells
TISSUE Mitosis is used to create multicellular organisms Cell --> Tissue --> Organ --> Organ system --> Organism Example:muscle cell --> muscle tissue --> stomach --> digestive system --> animal
ORGAN multicellular organism
ORGAN SYSTEM Example:muscle cell --> muscle tissue --> stomach --> digestive system --> animal
Created by: asimien907