Table 3.

Effects of the Mom1 and Mom2 Loci on the Incidence of Colon Polyps in N2 Offspring from the B6 × D2B6F1ApcMin and D2 × D2B6F1ApcMin  Backcrossesa

Genotypes of B6 × D2B6F1 Apc Min N2 offspring Mom1 S /Mom1 S Mom1 R /Mom1 S pvalues
Mom2+/Mom2+ 71.4% (5/7)37.5% (3/8) p= 0.3147
Mom2R/Mom2+ 8.6% (3/35)3.4% (1/29) p= 0.6198
p values p = 0.0012 p = 0.0256
Genotypes of D2 × D2B6F1 Apc Min N2 offspring Mom1 R /Mom1 S Mom1 R /Mom1 R Total
Mom2+/Mom2+ 66.7% (2/3)50.0% (1/2)60.0% (3/5)
Mom2R/Mom2+ 0.0% (0/9)14.2% (1/7)6.3% (1/16)
pvalue p = 0.0276

[i] a N2 progeny of D2B6F1ApcMin parents #5, #6, and #7 from Table 1 were classified according to strain background as well as genotype and phenotype at the Mom1 and Mom2 loci, respectively. The % of mice within each class is given. The numbers in parentheses show the actual number of mice with ≥1 colon polyp over the total number of mice in each class. P values were determined by the Fisher's exact test.