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a protein coded for by the p53 gene that stops the cell cycle at the G1 checkpoint if DNA is damaged
DNA in a non-dividing cell which takes the form of long threads not visible under a light microscope
phase of mitosis; nuclear envelope disappears, chromosomes become visible, spindle fibers form
phase of mitosis; centromeres replicate, sister chromosomes move into opposite poles of cell
the random movement of maternal and paternal chromosomes along the metaphase plate during Metaphase I; causes genetic variability
the failure of homologous chromosomes to separate during Anaphase I or failure of sister chromatids to separate in Anaphase II
a female with only one X chromosome; caused by nondisjunction. Egg of mother or sperm of father was missing an X Chromosome
a diploid cell; divides during meiosis I into a secondary oocyte and the first polar body
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