33. (4 Pts) Two parental plants, RRGGWW (round, yellow, and purple-flowered) and

Question

33. (4 Pts) Two parental plants, RRGGWW (round, yellow, and purple-flowered) and rrggww wrinkled, green and white-flowered), are mated to produce an F1 with dominant phenotypes (round, yellow and purple-flowered). Fl is then self-fertilized to produce F2 progeny with the following observed phenotypic proportions. In all cases, the capital letter allele is dominant to lower case allele (i.e. A is dominant to a),. Phenotypes of Offspring (F2) round round round round wrinkled wrinkled wrinkled wrinkled yellow yellow green green yellow yellow green green purple white purple white purple whitepurple white 269 98 86 27 88 Calculate the chi-square value (X) 34 30 7 267 B)201 C)5.45 D325 E690

Explanation / Answer

Chi square value = 2.67

Observed [O] Expected [E] O-E [O-E]2 [O-E]2/E Round,yellow,purple 269 639X27/64 = 270 -1 1 0.003 Round,yellow,white 98 639X9/64 = 90 8 64 0.711 Round,green,purple 86 639X9/64=90 -4 16 0.177 Round,green,white 27 639X3/64 = 30 -3 9 0.3 Wrinkled,yellow,purple 88 639X9/64 = 90 -2 4 0.044 wrinkled,yellow,white 34 639X3/64 = 30 4 16 0.53 wrinkled,green,purple 30 639X3/64 = 30 0 0 0 wrinnkled,green,white 7 639X1/64 = 10 -3 9 0.9 639 2.67

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