Today we finished the introductory topic of the class, in which we talked about mechanisms of generation of new genes, with some emphasis on gene duplication and horizontal gene transfer.
After class there were some doubts about paralogy and orthology, so make sure you understand the difference, or voice your questions in class tomorrow. The difference is simple, but its understanding very important. In case I didn't make my self clear, here's the one line version of the difference: Ortholog genes were separated by a speciation event. Paralog genes were separated by a gene duplication event. It is possible that there is a gene duplication event, and then a speciation event. The two new species will inherit BOTH copies of the gene. Copies 1 and 1 will be orthologous, as well as copies 2 and 2. But copies 1 and 2 will be paralogous within AND among species. Any questions? Please ask in class. No reason to be shy! (It will wake you up. If sleepy BRING COFFEE!)
Reading for Tuesday Sep 30th: Still chapter 4, pages 195-201.
Quiz #4 Q&As
1. Write 4 questions for the next quiz.
Answers will vary
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