chr start stop reference nuc variant nuc depth genic status zygosity variant ID 1 220321198 220321199 G C 15 GENIC homozygous 638797404 1 220321200 220321201 C T 15 GENIC homozygous 638797405 1 220321405 220321406 C A 17 GENIC homozygous 638797406