chr start stop reference nuc variant nuc depth genic status zygosity variant ID 20 3817423 3817424 C T 16 GENIC homozygous 109070041 20 3817525 3817526 C T 9 GENIC homozygous 109070043 20 3818721 3818722 G A 6 GENIC homozygous 109070045