Table 1  Phenotypes of Pygo2 wild-type, heterozyogous, and null E18.5 embryos on a Pygo1 null background.
Pygo2 +/+   Pygo2 +/-   Pygo2 -/-
Sample size  6  14  10
Observed phenotypes
 Average weight (g)  1.36  1.33  0.97 *
 Cleft palate  0  0  6
 Exencephaly  0  0  2
 Lens defect  0  0  10
 Reabsorption/in utero death  0  0  2
* Denotes a significant change (p < 0.01) of the average weight of the Pygo2 null group compared with both the Pygo wild-type and heterozygous groups.