particular species of tomato plant, the plants can bear fruits of different colo
ID: 163033 • Letter: P
Question
particular species of tomato plant, the plants can bear fruits of different colors. Suppose a researcher rosses a homozygous plant that bears white fruit with a different stock of homozygous plant that also bears white fruit. In the F1 generation, all of the fruits are red. Two F1 plants are then crossed and the F2 progeny are examined. The F2 generation contains 331 plants with red fruit and 258 with white fruit. What are the genotypes of the F2 progeny? Fruit color Genotypes red A B white What type of epistasis, if any, is present? duplicate recessive epistasis O O recessive epistasis O no epistasis O dominant epistasis O duplicate dominant epistasisExplanation / Answer
From the given number of the white and red fruits, we can find that the ratio of red over white fruits is 9:7
If we see all the types of epistasis we will find that given tomato plant has duplicate recessive epistasis.
Duplicate recessive epistasis is the type of epistasis in which when both the dominant alleles are present they complement each other give a new type of expression.
So, answer for the first question is
Red fruits genotype A_B_
White fruit genotype- aabb, A_bb, aaB_
Type of epistasis is duplicate recessive epistasis
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