Table 1.

Distribution of genotypes obtained from E430025E21Rik ^wt/ko x E430025E21Rik ^wt/ko matings

	Genotype
Age	wt/wt	wt/ko	ko/ko	p-value
P1	12	25	0	2.4 x 10−5
E19.5	2	3	0	0.23
E16.5	3	8	0	0.042
E13.5	4	6	0	0.056
Total	21	42	0	1.3 x 10−8
Ratio	1	2	0