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fish
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I was trying get more info about what causes lactose intolerance (caused by mutation or by inherited mutations?)
and came across this link: http://www.eurekalert.org/pub_releases/2002-01/uoc--uaf011402.php which is part of what Dr. Peltonen was discussing in the 30 min. lecture link. (UCLA and Finnish scientists) My american ears haven't adjusted to her thick accent yet. That pedigree chart she had went back what about 500 years? That's a serious chunk of work. There's a lot of info to digest in that lecture.
I think she said everyone was originally lactose intolerant- lactose tolerant was the mutation and lactose intolerant was original. The ancient human population in Africa couldn't tolerate milk before the humans migrated out of Africa. The a mutation hit the genome allowing a fraction that were lactose tolerant. This variant became more frequent in populations that were high users of dairy products. (selective advantage when humans started using the dairy products)
and came across this link: http://www.eurekalert.org/pub_releases/2002-01/uoc--uaf011402.php which is part of what Dr. Peltonen was discussing in the 30 min. lecture link. (UCLA and Finnish scientists) My american ears haven't adjusted to her thick accent yet. That pedigree chart she had went back what about 500 years? That's a serious chunk of work. There's a lot of info to digest in that lecture.
I think she said everyone was originally lactose intolerant- lactose tolerant was the mutation and lactose intolerant was original. The ancient human population in Africa couldn't tolerate milk before the humans migrated out of Africa. The a mutation hit the genome allowing a fraction that were lactose tolerant. This variant became more frequent in populations that were high users of dairy products. (selective advantage when humans started using the dairy products)