Biology 311C Lecture 29 - November 2, 2011 Biology 311C...

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November 2, 2011 Biology 311C Lecture 29 **Homework is due Monday at 9 am.** DNA is replicated so the genetic information in the parent cells have to be delivered to the daughter cells. When our cells divide, we get two daughter cells, and each get 46. The cells are going to divide, and the chromosomes duplicate before then. When DNA condenses and travels, it packs itself up. Before, it is made out of loose chromosomes. Most chromatin is loosely packed int eh nucleus during interphase and condenses prior to mitosis. Loosely packed chromatin is called euchromatin. During interphase a few regions of chromatin (centromeres and telomeres) are highly condensed into heterochromatin. Dense packing of the heterochromatin makes it difficult for the cell to express genetic information coded in these regions. Helicase is the first enzyme during replication which separates the two strands of DNA.
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Biology 311C Lecture 29 - November 2, 2011 Biology 311C...

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