What is the Cell Cycle? - Repeated pattern of growth, DNA duplication and cell division that occurs in eukaryotic cells. , What is interphase? - Growth phase of the cell. , What occurs in G1 phase? - Gap 1 phase, cell grows and makes proteins. , What occurs in S phase? - Synthesis phase, dna replication occurs, doubles the number of chromosomes. , What occurs in G2 phase? - Gap 2 phase, more cell growth, and protein synthesis. , What is a chromosome? - one long continuous thread of dna that consists of thousands of genes and regulatory info. , What is a gene? - Section of dna that contains instructions for making a protein. , What is a chromatid? - One half of a duplicated chromosome. , Whats is a sister chromatid? - Two identical chromatids? , What is a centromere? - Region of the condensed chromosomes that looks pinched. , Whats is the telomere? - Ends of the dna molecule. , Whats is mitosis? - Division phase of the cell cycle, 1 cell becomes 2 identical daughter cells. , What happens in prophase (1st level of mitosis)? - Chromosomes condense and are visible as sister chromatids, nuclear membrane disappears, and spindle fibers form out of centrioles. , What happens in metaphase ( 2nd level of mitosis)? - Spindle fibers connect to the centromere of each sister chromatid. , What happens in anaphase ( 3rd level of mitosis)? - Sister chromatids separate, pulling away from each other and becoming individual chromosomes, and chromatids move to the opposite ends of the cell. , What happens in telophase ( 4th level of mitosis)? - Chromosomes decondense and start to look chromatin again, nuclear membrane reforms around chromosomes at each pole, spindle fibers break down, and cytokinesis begins. , Whats is Cytokinesis? - The division of cytoplasm into 2 individual cells. ,

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