chr start stop reference nuc variant nuc depth genic status zygosity variant ID 20 4412056 4412057 G A 35 GENIC homozygous 109233440 20 4412185 4412186 C T 26 GENIC homozygous 109233441 20 4412819 4412820 T C 25 GENIC homozygous 109233442