Three examples of a specialized cell for animal cells Two examples of a specialized cell for plant cells Brain cells, blood cells, stem cells Cell Division New cells are produced from one cell, resulting in two cells identical to the original parent cell. A structure that contains DNA. Chromosome Stem cells, root cells Sister chromatids held together by a centromere. Interphase Majority of cells life is spent in which phase? G1 First phase of the cell cycle and occurs during Interphase. The cell is growing and making organelles. G1 S Cytokinesis Synthesis – chromosomes (DNA) are replicating (being duplicated); occurs during interphase. Cell is growing and preparing for mitosis; occurs during interphase. Nuclear Division; (prophase, metaphase, anaphase,telophase) Celluar division Prophase Chromosomes become visible G2 Mitosis Prophase Metaphase duplicated chromosomes line up along the equatorial plate of the spindle Metaphase Anaphase Chromosomes move to opposite poles of the cell. Anaphase Telophase 2 nuclei are formed. Telophase Cytokinesis 2 new identical daughter cells are formed. Cytokinesis Haploid One set of chromosomes Diploid Two sets of chromosomes Mitosis Occurs in somatic (body) cells and has 2 new identical daughter cells. Process for growth and repair. Mitosis Meiosis Crossing Over Meiosis Meiosis Meiosis Cancer Cells Crossing Over Sexual reproduction; produces gametes Results are genetic recombination. This cycle provides genetic variation in organisms. Haploid and diploid cells are in what type of cycle? This cycle has ½ the number of chromosomes as a parent’s body. Uncontrolled cell division; they are not responding to the signals that regulate cell growth. An area of a chromatid exchanged with a matching area on a chromatid of the homologous chromosome. Cancer Kills surrounding cells by using up their nutrients. Stem Cells Specialized cells such as brain cells, liver cells, blood cells, etc.. Sex cells (sperms and eggs) Gametes Zygote Non-disjunction Which cycle would this be in? Meiosis It is a fertilized egg cell. Homologous chromosomes do not separate correctly during meiosis.