Today we started chapter 11, on mutation, the source of genetic variation.
We talked about the kind of mutations we are going to be focusing on (those that alter the nucleotidic sequence of genes), and how it is detected in humans when they are reflected in the phenotype.
We also discussed what the rate of mutation is, and how it is calculated in humans, based on the observed number mutant phenotypes in a set of births.
After lecturing we did a quick and dirty overview of a couple of execises in the Drosophila gene mapping lab. A handout in pdf format has been uploaded to both, the p-drive and the WebCT site for the class explaining how to do a three-point testcross.
Note: A three-point testcross exercise will be included in the exam this Friday.
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