Social life & genomic imprinting

My post yesterday offered up a quick sketch of the phenomenon of genomic imprinting. In short, genomic imprinting is the selective expression of an allele conditional upon whether it is inherited from the father or mother. This selective expression is limited to a small subset of loci, perhaps about 200 in the typical mammal. These expression patterns often relate to conflicts over resources between offspring and mother, and have fitness implications for all individuals in question, mother, father and offspring. All of this is derived from the initial logic that maternal and paternal copies of alleles might have different interests in regards to resource allocation between mother and offspring. This makes sense, doesn't it? You have parents, and your father wants you to suceed at all costs, no matter the harm to your mother. Wait you say, back up, something doesn't sound right. And yes, I left something out.... Asymmetrical ...