chr start stop reference nuc variant nuc depth genic status zygosity variant ID 1 81268442 81268443 G GT 20 GENIC homozygous 60746650 1 81268447 81268448 G GT 21 GENIC homozygous 60746651 1 81268460 81268461 G GT 20 GENIC homozygous 60746652