631190-19-16P AID: 2498 | 27/12/2015
Quantitative trait locus (QTL) is a method that requires crosses between different strains to get the mapping population.
Hence, the first statement applies to QTL.
A genome-wide association is the method in which the entire genome is scanned to find QTL for a trait. Along with this this method also can identify specific genes in QTL.
Hence, the second and third statements apply to GWA.
Sampling of large number of individuals from a random population is used in both QTL and GWA methods to study the trait.
Hence, the fourth statement applies to both methods.
QTL method typically tests two alleles from two different parents.
Hence, the fifth statement applies to QTL.