11:216:101 Lecture Notes - Lecture 7: Mexican Tetra, Natural Selection, Saccharomyces

• School: Rutgers University
• Department: Ecology, Evolution, and Natural Resources
• Course: 11:216:101
• Professor: S Sukhdeo

Document Summary

Non-convergent: they all came up with different solutions to oxygen levels. Non-convergent each e. coli had different mutations to digest maltose instead of glucose. Many species adapted to low oxygen levels due to high mountain altitude. All of high altitude species had different mutations in hemoglobin (birds oxygen in red blood cells) If they all had the same mutation: convergent evolution. Grad student noticed some of the flasks become cloudy (turgid) Contamination made him restart all the flasks from that generation. Same conclusion, some of the flasks became turgid. Go back to before the day the flasks started turgid went back 72 flasks and 4 were turgid over and over again. Mutation: e. coli on its own managed to eat a new food source; citrate (salt) Extra copy of citrate transport in gene allows citrate to become a food source. Flasks are filled with many ingredients (chemicals) citrate is essential for metabolic activity of. Flasks eat once a day at 8am glucose.