chr start stop reference nuc variant nuc depth genic status zygosity variant ID 20 3345554 3345555 G A 46 GENIC homozygous 109370745 20 3347456 3347457 A G 26 GENIC homozygous 109068566 20 3347663 3347664 T C 29 GENIC homozygous 109068568