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A month ago
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


Complete a Punnett square to determine the expected testcross progeny on the basis of Mendel’s Law of Independent Assortment.

Compare the expected probabilities of each phenotype to the observed probabilities. Are the gene for fruit colour and the gene for fruit shape assorting independently? Explain
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Educator
A month ago
When you cross FFRR with ffrr, you'll get an F1 generation that's completely FfRr > Round and Red.

Crossing FfRr with ffrr should give you theoretically

1/4 - FfRr
1/4 - Ffrr
1/4 - ffRr
1/4 - ffrr

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