TABLE 1.

Genotyped offspring from YY1 heterozygous intercrosses

Age	No. of litters	No. of normal embryos	No. of resorbed embryos	No. with YY1 genotype:
				+/+	+/−	−/−
Postnatal	12	58	NAa	21	37	0
E12.5	9	60	5	12	38	0
E11.5	5	28	4	8	20	0
E10.5	6	32	11	12	20	0
E9.5	7	42	18	10	32	0
E8.5	14	84	23	22	62	0
E3.5	12	116		23	72	21

^aNA, not available.