Table 2

Genotype ratios of offspring at weaning following heterozygous intercrosses


Observed
Expected if semidominant, homozygous viable
Expected if semidominant, homozygous lethal

MommeD7



     Heterozygote*
65

60
     Wild type
25

30




MommeD8



     Homozygote*
14
27.5

     Heterozygote*
56
55

     Wild type
40
27.5





MommeD9



     Heterozygote*
31

37.3
     Wild type
25

18.7




MommeD10



     Homozygote*
14
77.25

     Heterozygote*
187
154.5

     Wild type
108
77.25


Offspring were classified as wild type, heterozygous or homozygous based on their GFP expression profiles. p-values: MommeD7, not significant; MommeD8, p < 0.005; MommeD9, not significant; MommeD10, p < 0.0001. *Progeny testing of mice classified based on GFP expression was carried out in a number of cases: 5 for MommeD7-/+, 11 for MommeD8-/-, 16 for MommeD8-/+, 8 for MommeD9-/+, 6 for MommeD10-/- and 11 for MommeD10-/+. In all cases the genotype was as expected. Presumed genotype was confirmed by genotyping for 8 MommeD10-/- and 79 MommeD10-/+ mice.

Ashe et al. Genome Biology 2008 9:R182   doi:10.1186/gb-2008-9-12-r182

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