Table 1. Summary of crossovers detected in the PAR in N2 progeny.

					Recombinants
Cross	Platform	Sex	n	NR	Single	Double
PWK/PhJ $\times$ CAST/EiJ	77K	XX	90	78	8	4
		XY	90	80	10	0
	11K	XX	18	17	1	0
		XY	20	17	3	0
		XO	1	1	0	0
WSB/EiJ $\times$ CAST/EiJ	77K	XX	2	2	0	0
		XY	4	3	1	0
	11K	XX	23	20	3	0
		XY	19	15	4	0

NR, non-recombinant.