BIO120H1 Lecture Notes - Lecture 19: Experimental Evolution, Disruptive Selection, Melanism

• School: UTSG
• Department: Biology
• Course: BIO120H1
• Professor: Spencer Barrett

Document Summary

Evolution of adaptation and the adaptation of biodiversity. Floral tubes usually have nectar on the bottom, so darwin predicted that the there should be a pollinator with a proboscis (tongue) long enough to access that nectar, and it was found a century later. It s tongue is coiled up when it flies: (^understand these definitions) Domesticated plants and animals, at the core of understanding cryptic or concealed variation. Selection by humans, this is the basic of animal breeding. Has a purpose or goal, and is one of the most important human inventions ever made (agriculture and animal husbandry) Has no propose, doesn t look into the future and the same as gravity or a blizzard. There are three different types of natural selection on quantitative traits. Stabilizing selection: here, the average individuals are the most favoured, so the variation lessens even thought the mean trait value could be the same.