The focus of today's lesson was on gene expression. We began our discussion by discussing Garrod's study of alkaptonuria and how that led him to deduce that a gene error is responsible for an enzymatic malfunction (he hypothesized that genetic diseases are inborn errors of metabolism). Beadle and Tatum's work with neurospora supported Garrod's hypothesis by using mutant strains grown in minimal media. Here is a link to a great animation about this experiment: Dolan DNA Learning Center.
In the last 15 minutes of class students were given time to look over last week's test on DNA Replication and Meiosis. Test corrections will be due Monday, December 13th at 3:05.
There is a quiz on Chapter 17 planned for Friday, December 10th.
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