BIOL108 Lecture Notes - Lecture 5: Macroevolution, Disruptive Selection, Peppered Moth

• School: University of Alberta
• Department: Biology (Biological Sciences)
• Course: BIOL108
• Professor: Trevor Pasanen

Document Summary

Selection doesn"t depend on plasticity. therefore natural selection can operate on any scenario where there is some genetically based phenotypic variation among individuals. Natural selection will operate when genetically based phenotypic variation has different fitness values. Collect seeds from all sites and grow all in a common environment. Prediction: variation will disappear in common garden. Results: most of original phenotypic variation was preserved in common garden (a lab in. This could be due to certain heights being favoured in different elevations. for instance, short height in high elevations and long heights in low elevations to help maximize photosynthetic rates. Experiment; take the same or similar genotypes and expose them to different environmental conditions. Took 76 clutches of 2 and split them. Raised in lab at low temperature (like rocky habitat) and warm temperature (like. Results: young from cool eggs had longer legs, and could run faster and forest habitat) preferred rocky habitats.