chr start stop reference nuc variant nuc depth genic status zygosity variant ID 20 3189489 3189490 T C 28 GENIC homozygous 109068271 20 3191459 3191460 T C 14 GENIC homozygous 109231512 20 3192458 3192459 A G 24 GENIC homozygous 109068273