I'm looking at one of my VCF files and I noticed that allele depth (AD) isn't just one number, but rather two values seperated by a comma
e.g.: GT:AD:DP:GQ:PL 0/0:1,0:1:3:0,3,27
The GATK doc doesn't really seem all that helpful here, as it doesn't explicitly describe what the two numbers are used for.
Can anyone explain? Thanks!