What must be true regarding the strains of organisms used to construct a QTL map?
A) they must differ for the quantitative trait
B) they must differ for the molecular markers
C) Both of these choices must be true.

Question

Quizplus · Accepted Answer

In order to construct a QTL map, the strains of organisms used must differ both for the quantitative trait being mapped and for the molecular markers used to construct the map. This allows for the identification of regions of the genome that are associated with the trait in question. If only one of these differences exists, it would not be possible to determine which markers are associated with the trait, or which regions of the genome are likely to contain the genes responsible for the trait.

What Must Be True Regarding the Strains of Organisms Used