In Tomatoes, Tall Is Dominant to Short, and Smooth Fruits

question 24

Multiple Choice

In tomatoes, tall is dominant to short, and smooth fruits are dominant to hairy fruits. A plant homozygous for both dominant traits is crossed with a plant homozygous for both recessive traits. The F₁ progeny are tested and crossed with 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) on different chromosomes.
• B) linked, but do not cross over.
• C) linked and show 10 percent recombination.
• D) linked and show 20 percent recombination.
• E) linked and show 40 percent recombination.

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