You are a gene hunter trying to find the genetic basis for a

You are a gene hunter, trying to find the genetic basis for a rare inherited disease. Examination of six pedigrees of families affected by the disease provides inconsistent results. For two of the families, the disease is co-inherited with markers on chromosome 7 For the other four families, the disease is co-inherited with markers on chromosome 12. Explain how this might occur.

Solution

This may occur when the same disease conditions can be caused by the defects in two or more numbers of genes which are present on different chromosomes.