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Practice_probability_and_ratio_problems_taken_from_old_exam_1s_ANSWERS_EMBEDDED

Practice_probability_and_ratio_problems_taken_from_old_exam_1s_ANSWERS_EMBEDDED

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Name: ___________________________ For questions 1-2, flower color in petunias is controlled by three independently-assorting genes (A, B, C), each with a dominant and recessive allele. The three genes interact in the following fashion to determine color: flower color symbol genotypes producing this color white W aaB_C_, aaB_cc, aabbC_, aabbcc yellow Y A_bbC_, A_bbcc red R A_B_cc purple P A_B_C_ 1. A multiply-homozygous purple petunia is crossed with a multiply-homozygous recessive white petunia and 1 1 produced all purple F offspring. What phenotypic ratio (W : Y : R : P) is expected if the F plants are self- 2 fertilized to produce an F generation? (Hint: The fork-line method would be much more time-efficient versus a HUGE Punnet square...) a. 9 : 3 : 3 : 1 b. 1 : 1 : 1 : 1 c. 16 : 12 : 9 : 27 d. 1 : 12 : 24 : 27 e. none of the above (a-d) is correct.
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