1.6  Genotypes AA, Aa, and aa occur with probabilities (π1 , π2 , π3 ). For n = 3 indepen- dent observations, the observed frequencies are (y1, y2, y3). a. Explain how you can determine y3 from knowing y1 and y2. Thus, the multinomial distribution of (y1,y2,y3) is actually two-dimensional. b.Show the ten possible observations (y1, y2, y3) with n = 3. c.Suppose (π1, π2, π3) = (0.25, 0.50, 0.25). What probability distribution does y1 alone have?

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