chr start stop reference nuc variant nuc depth genic status zygosity variant ID 20 2928985 2928986 G A 56 GENIC homozygous 140504176 20 2929070 2929071 A G 58 GENIC homozygous 130017537 20 2929481 2929482 T C 41 GENIC homozygous 140504177