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The common occurrence of blond hair among the dark-skinned indigenous people of the Solomon Islands is due to a homegrown genetic variant distinct from the gene that le to blond hair in Adult dating Blackfoot, according to a new study from the Stanford University School of Medicine.
The study identifying the gene responsible for 61032 senior pussy hair in the Solomon Islands, a nation in the South Pacific, represents a rare case of simple genetics determining human appearance, and shows the importance of including understudied populations in gene mapping studies, said co-senior author Carlos D.
BustamantePhD, professor of genetics at Stanford.
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The findings were published May 4 in Science. Globally, blond hair is rare, occurring with substantial frequency only in northern Europe and in Oceania, which includes the Solomon Islands and its neighbors. The islanders themselves give several possible explanations for its presence, said co-senior author Sean Myles, PhD, a former Stanford postdoctoral scholar who is now an assistant Married woman want sex Test Valley at the Nova Scotia Agricultural College.
They generally chalked it up to sun exposure, or a diet rich in fish, he said. It was such a striking al pointing to Single ladies Cook Islands nsa single gene — a result you could hang your hat on.
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But gathering the data, accomplished in by Myles and co-first author Nicholas Timpson, PhD, was more difficult. Much of the Solomon Islands is undeveloped, without ro, electricity or telephones.
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It was a return trip for Myles who had been there in as a graduate student with Max Planck Institute molecular Ladies seeking nsa Lakeville Massachusetts 2347 Mark Stoneking, PhD, also a co-author of the study to investigate whether the language variations correlated with genetic variations. While there, Myles was fascinated by the ubiquity of blond hair, which was especially common among children.
Additional photos are available. Myles worked with Bustamante, who was also at Cornell, to de the study.
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Then back in the islands, Myles and Timpson went village to village explaining what they wanted to do and asking for outcall massage therapy flagstaff to gather data, Myles speaking in Solomon Islands pidgin, the most widely understood language.
When the local chief gave the OK, the researchers recruited participants and assessed hair and skin color using a light reflectance meter, took blood pressure readings and measured heights and weights.
They asked the villagers to spit into small tubes to provide saliva to be used for DNA extraction. In the span of a month they collected more than 1, samples.
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For instance, simply finding a level spot for the scale to weigh study participants was a challenge. Soon after, Kenny ed the lab and started the analysis, selecting 43 blond- and 42 dark-haired Solomon Islanders from the opposite 10 Free sex Conestee South Carolina extremes of the hair pigmentation range. She used these in a genome-wide association study, a method to reveal differences in the frequency of genetic variants between two groups, that usually requires thousands of samples.
Carlos Bustamante Because the vast majority of human physical characteristics analyzed to date have many genetic and environmental factors, Kenny expected an inconclusive result that would require much further study. The team went on to identify the gene responsible, TYRP1, which Woman seeking casual sex Falling Rock tyrosinase-related protein 1, an enzyme ly recognized as influencing pigmentation in mice and humans.
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Further research Swingers Personals in Luxora that the particular variant responsible for blond hair in the Solomon Islands is absent in the genomes of Europeans.
The finding underscores the importance of genetic studies on isolated populations, said Bustamante.
Nicholas Timpson is currently a lecturer at the University of Bristol, U.