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| Description: Table 20.2 Hardy—Weinberg Mating Table for Two Alleles of an Autosomal Gene Mating Mating Frequency Progeny Genotypes A1A1 A1A2 AZAZ A1A, x AA (p2)(p2) = p4 p4 — — A1A1 X A1A2 2l(P2>(2Pq)1 = 41030: 2p3q ZP3q '— A1A1 X A2A2 2[(p2)(q2)] = 2p2q2 — 2p2q2 — A1A2 X AvAz (ZPqXZPq) = 4P2q2 quz ZPZqZ quz A1A2 X A2A2 2[(2Pq)(q2)l = 4W3 — 2an 2Pq3 A2A2 >< A2A2 (q2)(q2) = q4 — — q4 Total 1.0 p2 2pq qz Among the progeny, a common term is factored out of each summation to produce the frequency of each genotype: A1A1= P4 + 2P3q + 10qu = p21p2 + 2pq + c122 = p2 A1A2 = 293q + 2p2q2 + szq2 + 210013 = 2quP2 + m + m + 6122 = 2pq A2A2 = quz + M? + q“ = 0/2032 + 2100: + <72) = <72 The sum of progeny genotype frequencies is p2 + 2pq + q2 = 1.0.
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