BIO220H1 Chapter 1: lab Chapter 1
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BIO220H1 Full Course Notes
Verified Note
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Document Summary
Changes in environmental conditions have the potential to affect traits in natural populations in two ways: Effects of climate can directly affect the physiology or development of the species. Climate change can alter patterns in natural selection, inducing adaptive evolutionary. Ex; thicker vs thinner leaves drought conditions thicker leaves tend to survive vs wet years when thinner leaves have the advantage. Climatic variables selective agents (source of selection on the plants) Leaf thickness target of selection (trait whose expression is influences by selective agents) In order to measure selection two pieces of info are required. Measurements of the trait that we suspect is a target of selection. Estimates of the reproductive success of the individuals with each value of the trait. In order to determine which trait values are favored by selection must measure the reproductive success of fitness of individuals under observation. Absolute fitness: total # of offspring an individual produces.
