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The 14 markers used in the test are: M9, 92R7, SRY 1532, YAP, DYS 19, DYS 388, DYS 389i DYS 389ii, DYS 390, DYS 391, DYS 392, DYS 393, DYS 425 and DYS 426. The DNA test of the Y-chromosome consists of two parts, an allele test and a microsatellite test. The allele test reveals the haplogroup of each sample. This section of the Y-chromosome changes only very slowly and with a known mutation rate, so it is a very useful way to distinguish between large numbers of samples. Any member of the human population will belong to one of just a handful of haplogroups. Indeed, most Europeans will belong to one of two extremely common haplogroups. The four markers tested are M9, 92R7, SRY 1532 and YAP. The test result for each area of the microsatellite is expressed as a number. The sequence of numbers set up by all the microsatellite areas put together side by side is known as a haplotype. This can be thought of as a DNA signature. If two tests record identical numbers at each and every |
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