Table 4.

Genotype of E5.5–8.5 embryos obtained from Brg1-Brm double heterozygous intercrosses

Genotype		Expected^	Observed#	Observed/Expected
Brg1	Brm
+/+	+/+	1/12 (.083)	21 (.150)	1.8**
+/+	+/−	2/12 (.167)	31 (.221)	1.3
+/+	−/−	1/12 (.083)	14 (.100)	1.2
+/−	+/+	2/12 (.167)	21 (.150)	0.90
+/−	+/−	4/12 (.333)	39 (.279)	0.84
+/−	−/−	2/12 (.167)	14 (.100)	0.60*

^#A total of 140 embryos were genotyped. 11 empty deciduae were observed that could not be genotyped due to maternal contamination.

^{^}Because Brg1^−/− is lethal prior to implantation, no embryos were observed for this genotype regardless of Brm genotype (+/+, +/−, or −/−), and the absence of these mice were taken into account when determining the expected genotypic frequencies.

^*p < 0.05 and

^**p < 0.005 based on chi-squared goodness-of-fit statistical tests.