If gene frequencies are in Hardy-Weinberg equilibrium, the genotypes AA, Aa and aa occur with probabilities (1-0)², 20(1-0) and 0². Suppose that on haptoglobin type in a sample of n people, n₁ individuals have genotypes AA, n₂ individuals have genotypes Aa and n3 individuals have genotypes aa: AA n1 Haptoglobin Type Aa N2 aa N3 Thus, (n1, n2, n3)T is multinomial with parameters n and (1 - 0)², 20(1 – 0) and 0². (a) Write down the likelihood function L(0) of 0. (b) Assume that the prior for is uniform between 0 and 1. Find the posterior distribution of given data n₁, n2 and n3. Is this a known distribution? (c) Find the Jeffrey's prior for 0.

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If gene frequencies are in Hardy-Weinberg equilibrium, the genotypes AA, Aa and aa
occur with probabilities (1–0)², 20(1–0) and 0². Suppose that on haptoglobin type in
a sample of n people, n₁ individuals have genotypes AA, n₂ individuals have genotypes
Aa and n3 individuals have genotypes aa:
AA
n1
Haptoglobin Type
Aa
N2
aa
N3
Thus, (n₁, №2, n3)™ is multinomial with parameters n and (1 – 0)², 20(1 – 0) and 0².
(a) Write down the likelihood function L(0) of 0.
(b) Assume that the prior for is uniform between 0 and 1. Find the posterior
distribution of given data n₁, n2 and n3. Is this a known distribution?
(c) Find the Jeffrey's prior for 0.
Transcribed Image Text:If gene frequencies are in Hardy-Weinberg equilibrium, the genotypes AA, Aa and aa occur with probabilities (1–0)², 20(1–0) and 0². Suppose that on haptoglobin type in a sample of n people, n₁ individuals have genotypes AA, n₂ individuals have genotypes Aa and n3 individuals have genotypes aa: AA n1 Haptoglobin Type Aa N2 aa N3 Thus, (n₁, №2, n3)™ is multinomial with parameters n and (1 – 0)², 20(1 – 0) and 0². (a) Write down the likelihood function L(0) of 0. (b) Assume that the prior for is uniform between 0 and 1. Find the posterior distribution of given data n₁, n2 and n3. Is this a known distribution? (c) Find the Jeffrey's prior for 0.
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