It turns out that one of the most important aspects of mate choice in mammals, humans included, is to make sure that your mate's MHC is different from your own.
His running mate choice draws some clear lines with Romney's Democratic opponents over the size of the cuts in Ryan's plan and his prior votes on taxes, which they say favor the wealthiest Americans -- a point of contention in an election in which both sides consider themselves champions of the middle class.
Susan Patton never questions the norm that women should "marry up" -- and by extension, men should marry "down" -- on a variety of dimensions, including education, accomplishment and age. (Nor does she question the assumption that mate choice is universally heterosexual, but that is a topic for another debate.) Yet a thorough gender revolution means questioning such assumptions about how women (and men) select a life partner.
Relatives can be distinguished from non-relatives, even to the extent of understanding who is genetically different enough from the smeller to be a good choice of mate.
Senator Barack Obama revealed his choice for running mate earlier this morning in text messages.
All of those that made a choice picked a mate from the same species.
This time, there is a slim chance the choice of running mate could actually make a difference.
McCain's choice of running mate surprised many in the political world.
And this leads to the second false premise of Internet dating: that choosing a mate should be a rational choice, in which people carefully comparison-shop for partners.
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His last-minute choice as running-mate was Armando Caro Figueroa, who as Mr Menem's labour minister liberalised the labour market, creating thousands of temporary jobs.
John McCain's choice of Palin as his running-mate by a 54 to 37 percent majority.
Still, with Mr. Ryan so clearly associated with GOP economic policy, Obama aides argued that his selection as running mate would help make their case that the election is a choice between two competing visions, rather than a referendum on Mr. Obama and his handling of the economy.
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While it energized conservatives, McCain's choice of Alaska Gov. Sarah Palin as a running mate may have alienated moderate Republicans like Powell, Wall said.
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Many observers believe Al Gore's choice of Joe Lieberman - an orthodox Jew - as running mate will have boosted his support there.
He may also have softened the feminist vote by choosing as a running-mate Florida's secretary of state, Sandra Mortham, who favours choice on abortion.
Obama might have paid Biden the same compliment if his running mate hadn't already told supporters that Hillary Clinton would have been a better choice.
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As much as it may have evolved, in the human animal, as a motivation system for mate-finding, it was rarely given great consideration in the final reckoning of conjugal choice.
He pointed to a recent article by Elizabeth Rubin, in the New York Times Magazine, that describes Karzai's choice of Mohammed Fahim, a former Northern Alliance militia commander, as vice presidential running mate.
Both think Mitt Romney made a definitive choice in selecting budget wonk Rep. Paul Ryan (R-Wisc.) as his running mate.
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