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cell cycle pattern of growth DNA replication and cell division that occurs in a eukaryotic cell mitosis process by which a cell divides it nucleus and its contents cytokinnesis process by which the cell's cytoplasm divides chromosome long continuous thread of DNA and protiens that consists of numerous genes and regulatory information histone protien that organizes chromosomes and around which DNA wraps chromatin loose combination of DNA and protiens that is present during interphase chromatid one half of a duplicated chromosome centromere region of condensed chromosomes that look pinched telomere repeating nucleotide at the ends of DNA molecules that do not form genes and help prevent the loss of genes prophase first phase of mitosis when condenses metaphase second phase of mitosis when spindle fibers align the chromosomes along the cell equator anaphase third phase of mitosis which chromatids seperate and are pulled to opposit sides of the cell telophase last phase of mitosis when a complete set of idnetical chromosomes is positioned at each pole of the cell growth factor broad group of protiens that stimulate sell division apoptosis programmed cell death cancer common name for a class of diseases characterized by uncontrolled cell division benign having no dangerous effect on health malignant having a dangerous affect on health metastasize to spread by transferring a disease causing agent from the site of the disease to other parts of the body carcinogen substance that produces or promotes the development of cancer asexual reproduction offspring that are produced from one single parent binary fission asexual reproduction in which a cell divides into two different parts tissue group of cells that work together to perform a similar function organ group of different types of tissue that work together to perform a specific function or related function organ system two or more organs that work into a coordinated way to carry out similar functions cell differentiation process by which unspecialized cells develop into their mature form or function stem cell cell that can divide for a long period of time while remaining undifferentiated