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Siamese cats have colored

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Siamese cats have colored "points" because of a temperature-sensitive pigmentation gene. In cooler areas of a cat's body (nose and paws), this gene is expressed to a greater degree.
Siamese cat

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Through laboratory techniques that track quantities of mRNA, scientists can identify which genes are “turned on” and which are “turned off” in an organism’s tissue at a given time, as well as how vigorously these genes are expressed. This enables scientists to understand the time course of gene expression and the impact of environmental conditions on multiple genes. In this page, you will learn about two techniques that track RNA, Northern blot and SAGE.


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