chr start stop reference nuc variant nuc depth genic status zygosity variant ID 20 4852841 4852842 G T 20 GENIC homozygous 959708679 20 4853626 4853627 A G 18 GENIC homozygous 959708680 20 4853634 4853635 A C 18 GENIC homozygous 959708681