chr start stop reference nuc variant nuc depth genic status zygosity variant ID 20 8826217 8826218 T C 17 GENIC homozygous 45420238 20 8834896 8834897 C T 4 GENIC heterozygous 45777447 20 8834950 8834951 C T 2 GENIC homozygous 45420304