Biology 311C Lecture 36 - • Chromatid and sister...

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November 18, 2011 Biology 311C Lecture 36 The cell cycle consists of interphase (cell growth and copying of chromosomes in preparation for cell division) and mitotic phase (mitosis and cytokinesis). There are three subphases of interphases: synthesis, gap 1, and gap 2. In the mitotic phase, prophase goes through changes. Prometaphase metaphase anaphase Telophase and cytokinesis. We see cell division because it keeps us alive with repairs and helps us to grow. A zygote grows by mitosis and helps us become a fetus. Somatic cells are not reproductive cells and most undergo mitosis. Meiosis only occurs for germ cells which give rise to gametes. The human genome is the entirety of genes that make up our DNA code. A chromosome is one molecule of DNA and does not have to be condensed.
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Unformatted text preview: • Chromatid and sister chromatids are in metaphase. During mitosis, sister chromatids are separated. • In mitosis, we get identical cells, but in meiosis, it’s halved. • We have asters are made up of microtubules. There are two types: kinetochore, non-kinetochore. • The metaphase plate is an imaginary plate in which the chromosomes line up. • Each of the asters represent a pole and there are overlapping microtubules pushing the sister chromatins away from each other. • The chromosomes are attached to protein which will walk them down the microtubules towards one of the poles. • The kinetochores interact with the chromosomes and on the other side of the chromatins, it’s breaking apart and tubulin subunits are released....
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This note was uploaded on 02/21/2012 for the course BIO 311 C taught by Professor Mcclelland during the Fall '09 term at University of Texas at Austin.

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