Re: F'n Razz (BAHH)

On May 25, 7:04 pm, "Irish Mike" <ace...@xxxxxxx> wrote:

I didn't bother checking you out but concluded you are a pro-murder liberal
loon with more emotional problems than a psych ward.

Irish Mike


Opposites attract in human search for mate


April 28, 2009. … By Kylie MacLellan Kylie Maclellan – Mon May 25,
3:54 pm ET
LONDON (Reuters) – When it comes to choosing a mate, opposites really
do attract, according to a Brazilian study that found people are
subconsciously more likely to choose a partner whose genetic make-up
is different to their own.

They found evidence that married couples are more likely to have
genetic differences in a DNA region governing the immune system than
were randomly matched pairs.

This was likely to be an evolutionary strategy to ensure healthy
reproduction because genetic variability is an advantage for
offspring, Maria da Graca Bicalho and her colleagues at the University
of Parana in Brazil reported.

"Although it may be tempting to think that humans choose their
partners because of their similarities, our research has shown clearly
that it is differences that make for successful reproduction, and that
the subconscious drive to have healthy children is important when
choosing a mate," Bicalho said in a statement.

Scientists said it was not clear what signals attract the body to
people who are genetically dissimilar to themselves, but suggested
body odor or even face structure could play a role.

Many researchers have found evidence than animals are attracted to
members of the opposite sex with differences in major
histocompatibility complex or MHC, an immune system factor that also
plays a role in having healthy offspring.

Bicalho, who will present her findings at a conference of the European
Society of Human Genetics in Vienna on Monday, said the team compared
genetic data from 90 married couples with data from 152 randomly
generated control couples.

They found the real couples had significantly more dissimilarities in
MHC.

"Parents with dissimilar (genetic regions) could provide their
offspring with a better chance to ward infections off because their
immune system genes are more diverse," they wrote in a summary
prepared for the meeting.

"If MHC genes did not influence mate selection we would have expected
to see similar results from both sets of couples. But we found that
the real partners had significantly more MHC dissimilarities than we
could have expected to find simply by chance," Bicalho said.

"Our research has shown clearly that it is differences that make for
successful reproduction, and that the subconscious drive to have
healthy children is important when choosing a mate," she added.

Previous studies have suggested animals may use body odor as a guide
to identify possible mates as being genetically similar or dissimilar,
she added, but other physical factors may also be involved.

"Other cues such as face symmetry might play a role as well, but they
are still in the field of speculation," she said.
.

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