BIOL 155 Lecture Notes - Lecture 17: Gregor Mendel, Mendelian Inheritance, Selective Breeding
Document Summary
History of genetics: our knowledge of how genetics work is new, but humans have been manipulating inherited traits for hundred of years, farmers select for the best traits in crops and animals, selective breeding. The father of modern genetics" gregor mendel: lives in czech republic, became a friar, studied to become a science teacher, categorized heritable traits in pea plants. Mendel"s observed traits in pea plants: mendel noticed patterns of different inherited traits in pea plants, some traits were seen more than others, some traits would skip generations. True-breeding plants produce offspring identical to themselves: ex: tall/short offspring. Test cross: p1 generation, tall x short, f1 generation, all offspring have the tall characteristic. Crossing the f1 generation: tall x tall, f2 generation, most of the offspring tall, but short characteristic reappears. Mendel"s results: didn"t follow what was expected, revealed something new about inheritance.
