Friday, September 9, 2011
Wednesday, January 5, 2011
MHC and SEXUAL PREFERENCE
It has been suggested that MHC plays a role in the selection of potential mates, via olfaction. MHC genes make molecules that enable the immune system to recognise invaders; in general, the more diverse the MHC genes of the parents the stronger the immune system of the offspring. It would be beneficial, therefore, to have evolved systems of recognizing individuals with different MHC genes and preferentially selecting them to breed with.
Yamazaki et al. (1976) showed this to be the case for male mice, which show a preference for females of different MHC. Similar results have been obtained with fish.
In 1995, Swiss biologist Claus Wedekind determined MHC-dissimilar mate selection tendencies in humans. In the experiment, a group of female college students smelled t-shirts that had been worn by male students for two nights, without deodorant, cologne, or scented soaps. An overwhelming number of women preferred the odors of men with dissimilar MHCs to their own. However, their preference was reversed if they were taking oral contraceptives. The hypothesis is that MHCs affect mate choice and that oral contraceptives can interfere with this. A study in 2005 on 58 test subjects found that the women were more indecisive when presented with MHCs similar to their own. However, without oral contraceptives, women had no particular preference, contradicting the earlier finding. However, another study in 2002 showed results consistent with Wedekind's—paternally inherited HLA-associated odors influence odor preference and may serve as social cues.
In 2008, Peter Donnelly and colleagues proposed that MHC is related to mating choice in some human populations.
Rates of early pregnancy loss are lower in couples with dissimilar MHC genes.
Yamazaki et al. (1976) showed this to be the case for male mice, which show a preference for females of different MHC. Similar results have been obtained with fish.
In 1995, Swiss biologist Claus Wedekind determined MHC-dissimilar mate selection tendencies in humans. In the experiment, a group of female college students smelled t-shirts that had been worn by male students for two nights, without deodorant, cologne, or scented soaps. An overwhelming number of women preferred the odors of men with dissimilar MHCs to their own. However, their preference was reversed if they were taking oral contraceptives. The hypothesis is that MHCs affect mate choice and that oral contraceptives can interfere with this. A study in 2005 on 58 test subjects found that the women were more indecisive when presented with MHCs similar to their own. However, without oral contraceptives, women had no particular preference, contradicting the earlier finding. However, another study in 2002 showed results consistent with Wedekind's—paternally inherited HLA-associated odors influence odor preference and may serve as social cues.
In 2008, Peter Donnelly and colleagues proposed that MHC is related to mating choice in some human populations.
Rates of early pregnancy loss are lower in couples with dissimilar MHC genes.
(null)
It has been suggested that MHC plays a role in the selection of potential mates, via olfaction. MHC genes make molecules that enable the immune system to recognise invaders; in general, the more diverse the MHC genes of the parents the stronger the immune system of the offspring. It would be beneficial, therefore, to have evolved systems of recognizing individuals with different MHC genes and preferentially selecting them to breed with.
Yamazaki et al. (1976) showed this to be the case for male mice, which show a preference for females of different MHC. Similar results have been obtained with fish.
In 1995, Swiss biologist Claus Wedekind determined MHC-dissimilar mate selection tendencies in humans. In the experiment, a group of female college students smelled t-shirts that had been worn by male students for two nights, without deodorant, cologne, or scented soaps. An overwhelming number of women preferred the odors of men with dissimilar MHCs to their own. However, their preference was reversed if they were taking oral contraceptives. The hypothesis is that MHCs affect mate choice and that oral contraceptives can interfere with this. A study in 2005 on 58 test subjects found that the women were more indecisive when presented with MHCs similar to their own. However, without oral contraceptives, women had no particular preference, contradicting the earlier finding. However, another study in 2002 showed results consistent with Wedekind's—paternally inherited HLA-associated odors influence odor preference and may serve as social cues.
In 2008, Peter Donnelly and colleagues proposed that MHC is related to mating choice in some human populations.
Rates of early pregnancy loss are lower in couples with dissimilar MHC genes.
Yamazaki et al. (1976) showed this to be the case for male mice, which show a preference for females of different MHC. Similar results have been obtained with fish.
In 1995, Swiss biologist Claus Wedekind determined MHC-dissimilar mate selection tendencies in humans. In the experiment, a group of female college students smelled t-shirts that had been worn by male students for two nights, without deodorant, cologne, or scented soaps. An overwhelming number of women preferred the odors of men with dissimilar MHCs to their own. However, their preference was reversed if they were taking oral contraceptives. The hypothesis is that MHCs affect mate choice and that oral contraceptives can interfere with this. A study in 2005 on 58 test subjects found that the women were more indecisive when presented with MHCs similar to their own. However, without oral contraceptives, women had no particular preference, contradicting the earlier finding. However, another study in 2002 showed results consistent with Wedekind's—paternally inherited HLA-associated odors influence odor preference and may serve as social cues.
In 2008, Peter Donnelly and colleagues proposed that MHC is related to mating choice in some human populations.
Rates of early pregnancy loss are lower in couples with dissimilar MHC genes.
Sunday, January 2, 2011
Happy new year folks
The dreams u HAD,
The sweet moments u EXPECTED,
The things u MISSED,
All will come to u in this new year.
Wish u a happy NEW YEAR!
Wish u sucess in everything u do in 2011.
The sweet moments u EXPECTED,
The things u MISSED,
All will come to u in this new year.
Wish u a happy NEW YEAR!
Wish u sucess in everything u do in 2011.
Saturday, November 27, 2010
Post Three
strong enough to mask the senseless chatter, martini glasses clinging and thumping of shoes on the dance floor. Flickering lights on and off casted ghastly shadows of the dancing crowd. Suddenly, a terrified high pitched cry for help held the club still for a moment.
Help help. He was just dancing. I don't know what just happened. Oh my god!
Post Two
There was a young man lying on the ground drenched in his sweat. It appeared as if he fell on the ground unconsious. Still he was unconsious. Everybody was staring at the guy but nobody offered to help or nobody dared to. She was crying in panic but even she didn't touch the guy on the floor
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It has been suggested that MHC plays a role in the selection of potential mates, via olfaction. MHC genes make molecules that enable the imm...
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There was a young man lying on the ground drenched in his sweat. It appeared as if he fell on the ground unconsious. Still he was unconsious...
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An under illuminated night club in the latter half of the night. Still the music was strong enough to mask the senseless chatter, martini gl...
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It has been suggested that MHC plays a role in the selection of potential mates, via olfaction. MHC genes make molecules that enable the imm...
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The dreams u HAD, The sweet moments u EXPECTED, The things u MISSED, All will come to u in this new year. Wish u a happy NEW YEAR! Wish u su...
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strong enough to mask the senseless chatter, martini glasses clinging and thumping of shoes on the dance floor. Flickering lights on and ...
