Mutation and Genome

[h.shahbodaghkhan]

Imagine the disappearance of chlorophyll in the leaves of the trees and the absence of trichomes, each caused by recessive mutations at three different sites A, B and C in Arabidopsis. Given the triple mutation and assuming that the mutant sites are on one chromosome,

How can we explain that we can arrange the mutant sites relative to each other on the chromosome?