chr start stop reference nuc variant nuc depth genic status zygosity variant ID 20 3819970 3819971 G A 45 GENIC homozygous 109389140 20 3821120 3821121 G A 36 GENIC homozygous 109389141 20 3821637 3821638 C G 37 GENIC homozygous 109070057