BIO120H1 Lecture : Bio lab 1 notes Sep 27 2009

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BIO120H1 Full Course Notes
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BIO120H1 Full Course Notes
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zsurviving and reproducing is called an adaptation j can be a physical characteristics or a behaviour. Noun j trait, verb j adapt to certain environment. Mechanism fro process of adaption j natural selection. Mutation and recombination create the new traits and new combination of traits. Fintess j the ability to survive and reproduce. Natural selection results from the variation of individuals in the number of surviving offsprings they contribute to the next generation. If the higher fitness traits are heritable j these traits will present a larger proption in next generation. Natural selection and inheritance are repeated every generation. Evolution: the process jchange over generations in the proportion of individuals with a certain trait. Not all traits are adaptations: some differences are neutral. Genetic drift and gene flow also change genetics, but they may result in random varitation, so may not be adaptation. Few hypothesis: two types j viability and competition for mates.

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