Table 1.

Genotypes of the Shld2 ^+/−; Brca1 ^Δ11/+ x Shld2 ^+/−; Brca1 ^Δ11/+ intercross

Genotype	Total mice	Observed frequency	Expected frequency
Shld2 +/+; Brca1 +/+	8	0.0833	0.0625
Shld2 +/−; Brca1 +/+	6	0.0625	0.125
Shld2 −/−; Brca1 +/+	10	0.1042	0.0625
Shld2 +/+; Brca1 Δ11/+	12	0.1250	0.125
Shld2 +/−; Brca1 Δ11/+	37	0.3854	0.25
Shld2 −/−; Brca1 Δ11/+	14	0.1458	0.125
Shld2 +/+; Brca1 Δ11/Δ11	0	–	0.0625
Shld2 +/−; Brca1 Δ11/Δ11	0	–	0.125
Shld2 −/−; Brca1 Δ11/Δ11	9	0.0938	0.0625
Total	96

χ² = 33.208, P = 5.649 × 10⁻⁵.