TABLE 1.

Numbers of Y chromosomal microsatellites identified

	No. of loci selected from humans using genome browser			No. of loci selected from chimpanzees using genome browser			No. of loci amplified by PCR in humans and chimpanzees
Motif size	With chimpanzee homologs	Loci in PAR or with duplicates elsewhere in the genome	Total useda	With human homologs	Loci in PAR or with duplicates elsewhere in the genome	Total useda	Where sequences were also identified	Polymorphic in chimpanzeesab	Polymorphic in humansac
2	197	64	133	102	13	89	0	0	0
3	35	21	14	24	9	15	19	11	13
4	90	38	52	63	18	45	40	30	35
5	18	10	8	6	5	1	7	3	6
Total	340	133	207	195	45	150	66	44	54

^aWe include only loci found in both species in the nonrecombining portion of the Y chromosome (outside the pseudoautosomal regions, PAR) and without homologs elsewhere in the genome.

^bBased on seven unrelated chimpanzee males (Erler et al. 2004).

^cBased on eight unrelated human males (Kayser et al. 2004).