chr start stop reference nuc variant nuc depth genic status zygosity variant ID 20 49993830 49993831 G C 10 GENIC possibly homozygous 45585537 20 49993853 49993854 C T 2 GENIC homozygous 45585539 20 49994244 49994245 T TC 1 GENIC homozygous 45585545