ECON 1BB3 Lecture Notes - Lecture 5: Medium Ground Finch, Binoculars, Selective Breeding

• School: McMaster University
• Department: Economics
• Course: ECON 1BB3
• Professor: Hannah Holmes

Document Summary

Darwin realized what was happening in the artificial setting was also happening in the real setting (i. e. plant and pigeon breeders) artificial selection -cabbage varieties. Brussel sprouts comes from the shoots kohlrabi comes from the stems artificial selection - tomatoes gene fw2. 2 -- reduces cell division, the wild type. Breeders have selected for a genetically unmanipulated domestic tomato so it"s bigger. In evolution: changes occur due to changes in regulation of the gene, not the protein. Researchers took a sibling plant, and then inputted the fw2. 2 gene researchers were able to grow a smaller tomato (resembles the smaller, wild-type tomato) Has to do with when and where it is expressed -- with reference to coding and regulatory region of the gene. Regulatory region responsible for turning on and off the gene. Bio 3ff3 page 1 (bias) natural selection - orange hot chili peppers. If something"s increasing linearly and something"s increasing exponentially -- eventually the exponential will always outnumber.