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[QUOTE]Originally posted by DD'eDeN: [QB] Mammoths became white, warmer? http://www.sciencemag.org/news/2017/03/last-lonely-woolly-mammoths-were-genetically-screwed "The researchers identified a series of major detrimental mutations in the Wrangel Island mammoth. One combination of altered genes likely led to the loss of a large number of olfactory receptors for detecting smells. Another suite of mutations would have reduced the number and variety of the animals’ urinary proteins. Together, those changes would have wreaked havoc on the mammoths’ ability to mark and recognize territory, determine rank, and choose mates, if—like modern mammals—they relied on odors for these tasks. The result for the Wrangel Island mammoth community, which numbered about 300 based on population genetics models, could have been social chaos, researchers report today in PLOS Genetics. In another bizarre twist, two peculiar mutations to a gene known as FOXQ1—well studied in rodents and rabbits—would have given the Wrangel Island mammoths a translucent, cream-colored, satiny coat. The hairs of its fur would have lacked an inner core, possibly robbing them of their insulating properties." - - - I would agree that inbreeding occurred, but question if 'white' fur coat is detrimental in arctic, and if hollow hair is detrimental in arctic, since polar bears have both conditions and have been very successful. Smelling might have lost importance, compared to vision. Tropical rainforest elephants have poor vision but good olfaction, Wrangels island was very different. [/QB][/QUOTE]
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