Table 3 Expected offspring phenotype as a function of their own genotype and the genotype of their mother when there is a genomic imprinting effect
Offspring genotype
A1A1A2A1A1A2A2A2Maternal litter average
Maternal genotype
 A1A1+am + ao+am + doio+am + aop1 + dop2 – iop2
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 A1A2,  A2A1dm + aodm+ do – iodm+ do + iodm – ao+ dm + Embedded Imagedo+ Embedded Image(ao + io) (p1 – p2)
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 A2A2–am+ do + io–am – ao– am – aop2 +dop1 + iop1
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Offspring averageamp1 + dmp2 + aoamp1 + dmp2 +do – io–amp2 + dmp1+do+ io–amp2 + dmp1 – ao
  • The format matches Table 1, except that, for the offspring, the reciprocal heterozygotes are separated into two classes that differ in the parent of origin of their alleles (with the paternally inherited allele listed first). The cells with dashes are the ones that would be used in the identification of additive maternal effects in the statistical cross-fostering design (Figure 1). The imprinting effect in these cells is boxed in boldface type.