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In tomatoes, tall is dominant to dwarf and smooth fruits are dominant to hairy fruits. A plant that is homozygous for both dominant traits is crossed with a plant that is homozygous for both recessive traits. Crosses of the F1 progeny yield the following results: 78 tall smooth fruits, 82 dwarf hairy fruits, 22 tall hairy fruits, and 18 dwarf smooth fruits. These data indicate that the genes are ____

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Answer:

Genes are linked and show recombination for 20% of new genotype

Explanation:

The two genes for height and fruit type are unable to assort independently and hence the recombinant species are formed. This phenomenon is known as linking of genes.

Here the total number of species are

[tex]78+82+22+18 = 200[/tex]

Out of this 200 new offspring, recominant pairs are 22 tall hairy fruits, and 18 dwarf smooth fruits.

So the total number of recombinant pairs

[tex]22+18= 40[/tex]

% of recombination [tex]= \frac{40}{200} * 100\\= 20%[/tex]

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