BIO 191 Lecture Notes - Lecture 14: Y Chromosome, Heredity, Cell Surface Receptor
4 Apr 2016
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Independent events ( and )- events that can both occur, and have no effect on each other are termed independent events. When dealing with independent events, you will usually multiply their probabilities. Mutually exclusive events ( or )- events that cannot both occur are said to be mutually exclusive. When dealing with mutually exclusive outcomes, you will usually add their probabilities. Pea plant (pisum sativum) and crossed true-breeding varieties and looked at discrete traits that differed between the varieties. A pea plant could have controlled matings, reciprocal crosses, multiple generations, lots of progeny, lots of varieties, yummy peas. Mendel looked at discrete characters (purple vs white) or (wrinkled vs smooth), and made sure that they were true breeding. For each character mendel studied, one trait appeared to mask the other. When he crossed the progeny to each other, he found the masked trait reappeared in the next generation in 3:1. Blending was rejected, only purple plants offspring.
