BIO120H1 Lecture Notes - Lecture 2: Heredity
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BIO120H1 Full Course Notes
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1st to use evolution, 1st to provide causal mechanism ( inheritance of. E. g. giraffe keeps stretching neck, offspring have longer necks acquired characters ) All organisms have descended with modification from common ancestors. Process leading to adaptation is natural selection operating on variation. Geological processes explain history of earth ( gradualism ) 4 similar species endemic to islands, descended from mainland ancestor. Essay on the principle of population (1838) Population explosion as population increases, makes it difficult to everyone to survive & reproduce. Darwin: applies to all populations , not just humans. Potential for population to explode, results in competition. Heredity: progeny resemble their parents more than unrelated individuals. Selection: some forms are more successful at surviving and breeding than others in a given environment. Thus genetic information cannot pass from soma to gametes and onto the. Somatic cells ( soma/body) do not function as agents of heredity next generation.
