chr start stop reference nuc variant nuc depth genic status zygosity variant ID 20 4217127 4217128 G A 23 GENIC homozygous 109233298 20 4218022 4218023 A G 34 GENIC homozygous 109073808 20 4218419 4218420 G T 29 GENIC homozygous 109073810