Help reading gene markers
Just googling, they are SSLPs.  You do PCR, and the different alleles make different length amplicons.  Looks like there is some kind of artifact that causes some of the amplicons to have peaks that look 2, or 4, or 6 letters shorter than the true length.

So for the top marker, the 211 bp long allele is linked to the disease, and for the other one, the 118 bp allele is linked to the disease.