Probability Theory (i): One Random Variable
The DNA in an organism consists of very long sequences from an alphabet of four letters (nucleotides), a,g, c, and t (for adenine, guanine, cytosine, and thymine, respectively).1 These sequences undergo change within any population over the course of many generations, as random mutations arise and become fixed in the population. Therefore, two rather different sequences may well derive from a common ancestor. Suppose we have two small DNA sequences such as those in (1.1) below, perhaps from two different species, where the arrows indicate paired nucleotides that are the same in both sequences.
KeywordsExponential Distribution Binomial Distribution Geometric Distribution Discrete Random Variable Continuous Random Variable
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