In tomatoes, tall (D_) is dominant to dwarf (dd) and smooth fruit (P_) is domina

Question

In tomatoes, tall (D_) is dominant to dwarf (dd) and smooth fruit (P_) is dominant to pubescent fruit (pp). You have two tall plants with smooth fruit (plant 1 and plant 2) that you know are both dihybrids (Dd Pp). You testcross each plant to a third plant that is dwarf and has pubescent fruit and get the following progeny with the following phenotypes: What is the likely explanation for the drastic difference between these two crosses? a) The two genes are assorting independently in plant 1 and are linked in are in repulsion in plant 1 but in coupling in plant 2. e) In plant 1 the two genes have cytoplasmic inheritance and in plant 2 the two genes have nuclear inheritance.

Explanation / Answer

b)The two genes are linked in plant 1 and are assorting independently in plant 2.

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