BIS 10 Lecture Notes - Lecture 8: Dna Replication, Gene Expression, Cas9

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Describe how a gene gets turned on. Describe how viruses can hijack gene expression. Describe what is needed to make a new gene. Understand how viruses can be used for good. In dna, one gene as determining or the code for one. A ski(cid:374) (cid:272)ell does(cid:374)"t (cid:449)a(cid:374)t to tur(cid:374) i(cid:374)to a (cid:374)euro(cid:374). To carry out development: each cell types expresses specific genes necessary for the cell to do its job. To divide into two: there are genes that promote dna replication and cell division, there are genes that prevent dna replication and cell division. Want that controls b/c if cells divide too much, that is part of the process for cancer. During differentiation we turn on different genes during different times. To respond to signals from outside (could be from the body or from the environment): white blood cells receive signals. To maintain themselves in a healthy state: cells monitor their own state and turn on genes to fix problems.

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