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Unformatted text preview: thing looks good," -- now that set of cyclin is
ubiquinated and moved to proteasome and broken down, thus eliminated. A fluorescent dye binding DNA and a fluorescently labeled antibody against tubulin
allow excellent visualization of the mitotic stages.
DNA: red Prophase Early metaphase Metaphase Anaphase Telophase Late telophase Fig. 3-14 Specific stages of mitosis are difficult to see in dividing cells in tissues. At best
condensed chromatin in such “mitotic figures” can be seen, as shown in
sections here. THESE ARE MITOTIC DIVIDING CELLS!!!!! LOOK FOR SUPER CONDENSED CHROMATIN. Fig. 3-16 Meiosis resembles mitosis mechanically, but only occurs in germ cells (oogonia
in the ovary, spermatogonia in testis), which are haploid, not diploid.
Fig. 3-21 FEMALE OOCYTES HAVE A PROPHASE THAT LASTS FROM WHEN SHE'S A FETUS TO WHEN SHE OVULATES!!!!!!!!!!!!
Two most important aspects of meiosis:
(1) Begins with a very long prophase, in which synapsis (pairing of homologous
chromosomes) and their crossing-over occur. (2) After the first meiotic division, there is no more DNA replication before the
cells quickly divide again to form haploid cells (wi...
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- Spring '14