Table 2.

Total Human IRs >8000 bp on X- and Y-chromosomes and Autosomes

	≥99%		≥95% to 99%		≥75% to 95%		Total (≥75%)
Arm identity	Total	Known testes gene	Total	Known testes gene	Total	Known testes gene	Total	Known testes gene
X-chromosome	20	10	3	1	1	0	24	11
Y-chromosomea	10	6	0	0	3	1	13	7
Autosomes	17	1	17	0	25	0	59	1
Totals	43	17	22	1	30	1	96	19

^aAs described in Skaletsky et al. (2003), including IRY-23.2 (Table 1).