Question

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

a; linked, but do not cross over.
b; linked and show 40 percent recombination.
c; on different chromosomes
d; linked and show 10 percent recombination.
e; linked and show 20 percent recombination.

Answer 1

Option E, linked and show 20 percent recombination

Step-by-step explanation:

The total offspring produced are

`78+82+22+18\\= 200`

Out of the total offspring produced,
`22+18` offspring do not have traits similar to their parents.

This shows that there has been a recombination of genes which has resulted into mixed traits of offspring.

Thus, the total percentage of recombination offspring is

`(40)/(200) * 100\\= 20`%

Hence, option E is correct.