meiosis and miosis
...cks of these microtubules are used to grow the mitotic spindle from the region of the centrioles. Metaphase: (mitosis) Tension applied by the spindle fibers aligns all chromosomes in one plane in the center of the cell. (Meiosis) All the chromosomes line up on the metaphase plate in no order. During alignment the chromatid arms may overlap and fuse. Anaphase: (Mitosis) Spindle fibers shorten, the kinetichores separate, and the chromatids are pulled apart and start moving to the cell poles. (Meiosis) Kinetochore spindle fibers contract, pulling homologous pairs away from each other. Telophase: (mitosis) The daughter chromosomes arrive at the poles and the spindle fibers that have pulled them apart disappear. (Meiosis) A cleavage furrow forms fallowed by cytokinesis. Each daughter cell has a single set of chromosomes, half the original number. Cytokinesis: The spindle fibers not attached to chromosomes begin breaking down until only that portion of overlap is left. It is in this region that a contractile ring cleaves the cell into two daughter cells. Diploid A full set of genetic material, consisting of paired chromosomes one chromosome from each parental set. Most of the animal cells have a diploid. Chromosome-- individual threads within a cell nucleus, replicating genetic structures of cells containing the cellular DNA that bears in its nucleotide sequence th...