BIO 3119 Lecture Notes - Lecture 2: Mutual Exclusivity, Population Genetics, Allele Frequency

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By the end of this section, you should: Be able to recognize whether outcome probabilities are mutually exclusive, overlapping, or conditional, and how to solve questions regarding probability. Appreciate the utility of, and interpret output from basic mathematical models (e. g. , graphical analysis, finding equilibria, assessing stability) Probability is a measure of the likelihood of some event, x , occurring. o. We"ll symbolize it pr" (because p will be used for genotype/gamete frequency, p for allele frequency, and p-value for the probability from statistical tests) o. A probability trial is any sort of occurrence (e. g. , the birth of a child, a pair of dice are rolled, two alleles are selected) o. The probability of x is the # of times x occurs out of a large number of trials: Pr(x) = # times outcome x occurred / n (ex. the probability of x is its relative frequency over the long run)

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