Tomato Plants In tomato plants, round fruit (R) is dominant to oval fruit (r). Pure breeding plants with red and round fruit (FFRR) were crossed to pure breeding plants with yellow and oval fruit (ffrr). The red and round F1 progeny were then testcrossed to plants that were homozygous recessive for both genes (ffrr) with the following results: Phenotypes Number of Offspring Red and round 2 255 Red and oval 290 Yellow and round 310 Yellow and oval 2 145 Convert the expected phenotypic ratio from Part A into the expected probability for each of the four phenotypes and record them in the table below. Calculate the probability for each of the four phenotypes observed in the cross from the data presented at the beginning of the question by dividing the number of progeny in each class by the total number of progeny and record these in the table below.

Human Heredity: Principles and Issues (MindTap Course List)
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Author:Michael Cummings
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Chapter5: The Inheritance Of Complex Traits
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Problem 7QP: Sunflowers with flowers 10 cm in diameter are crossed with a plant that has 20-cm flowers. The F1...
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Tomato Plants
In tomato plants, round fruit (R) is dominant to oval fruit (r). Pure breeding plants with red and round fruit (FFRR) were crossed to pure breeding plants with yellow and oval fruit (ffrr).

The red and round F1 progeny were then testcrossed to plants that were homozygous recessive for both genes (ffrr) with the following results:

Phenotypes Number of Offspring
Red and round 2 255
Red and oval 290
Yellow and round 310
Yellow and oval 2 145
  1. Convert the expected phenotypic ratio from Part A into the expected probability for each of the four phenotypes and record them in the table below.

  2. Calculate the probability for each of the four phenotypes observed in the cross from the data presented at the beginning of the question by dividing the number of progeny in each class by the total number of progeny and record these in the table below.

Probability = Number of Progeny in Phenotype Class ÷ Total Progeny

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