That? >> i have no idea. they're basically representing where, on what chromosome this would be on. chromosome 3, chromosome 8, about where on the dna molecule that they are located. these locations that i test. >> all right. tell me the significance of this one right here. that i'm circling. >> the amelojenin location is in addition to the 13 location. it's a sex determining location. it gives me an indication of whether or not that individual has two x chromosomes, which would make them a female, or an x and a y chromosome, which would make them a male. >> okay. if you could move to that mid...