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Download Unit 6 - Cell Cycle fact sheet.pub
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The Cell Cycle Comparison of Mitosis and Meiosis Mitosis and Meiosis Fact Sheet Mitosis - body cells, repair and growth Interphase - The cell is engaged in metabolic activity and prepare for mitosis. Prophase - Chromatin in the nucleus begins to condense and becomes chromosomes. The nucleolus disappears. Nuclear membrane dissolves. Metaphase - Spindle fibers align the chromosomes along the middle of the cell (the met‐ aphase plate). Anaphase - The paired chromosomes separate at the centromeres and move to opposite sides of the cell. Mitosis Meiosis Occurs in what type of cells? Body cells Gametes Does crossing over happen? No Yes How many times does the cell divide? 1x 2x How many daughter cells are created? 2 4 Are the daughter cells identical? Yes No Diploid (2N) Haploid (N) Asexual Sexual Are the daughter cells Haploid or Diploid? Telophase - Chromatids arrive at opposite poles of cell, and new membranes form around the daughter nuclei. The chromosomes disperse and become chromatin. What kind of reproduction? Vocabulary Gametes - Sex cells. (E.g. sperm and eggs) Haploid - cell with one of each kind of chromosome. (N) Meiosis - production of gametes Diploid - cell with two of each kind of chromosome. (2N) Cytokenesis - when the cell cytoplasm divides and two new cells are formed. Cleavage furrow - in Interphase Prophase I Metaphase I Anaphase I Telophase I animal cell where cell pinches during cytokenesis. Cell Plate - in plant cells where the cell wall starts to form to form during Prophase II Metaphase II Anaphase II Telophase II Cytokenesis cytokenesis. Prophase I - DNA condenses, the nuclear envelope disappears, and spindle fibers start to form. As DNA condenses homologous chromosomes pair up forming tetrads and exchange DNA in a process called crossing over. Metaphase I Tetrads line up at the equator. Anaphase I Tetrads pull apart and chromo‐ somes and they move to the opposite the poles. Telophase I Chromosomes decondense and the nuclear envelope reforms. Each nucleus is now haploid. Meiosis II - The stages are very similar to mitosis but the sister chromatids are not identical.
