chr start stop reference nuc variant nuc depth genic status zygosity variant ID 12 19172519 19172520 G C 19 GENIC homozygous 955965119 12 19172520 19172521 G T 18 GENIC homozygous 955965120 12 19172521 19172522 G T 18 GENIC homozygous 955965121