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In roses, red flower color is determined by the dominant R allele, while rr homozygotes are white. The presence of thorns is determined by

 

In roses, red flower color is determined by the dominant R allele, while rr homozygotes are white. The presence of thorns is determined by the dominant T allele, while tt homozygotes lack thoms. Both mutations are completely penetrant. A test cross was performed between a rose plant of unknown genotype with a white flowered, thornless rose plant (rr tt) and the following 200 progeny plants were obtained: 24 white flowers, thorny plants 73 red flowers, thorny 26 red flowers, no thorns 77 white flowers, no thorns Select the three statements below that are TRUE. 2 points for a correct answer. -1 point for an incorrect answer. The lowest possible score for this question is 0. OA The genotype of the red flowered, thorny plant is Rr Tt. B. The homologs in the plant with unknown genotype are RT and rt. OC. The homologs in the plant with unknown genotype are Rt and r T. D. The map distance between R and T is 25 CM. E. The genotype of the progeny plants with red flowers and no thorns is RR tt. OF. The R and T genes independently assort during meiosis.

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