Lactose3 - 3 Rival Hypotheses Say cheese! 1. Culture...

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1 3 Rival Hypotheses 1. Culture Historical Hypothesis “Say cheese!” 2. Ancestral Pastoralism 3. Calcium Absorption Hypothesis Lactose lessons on science What is the survival and reproduction advantage of L? Culture historical Ancestral pastoralism Calcium absorption Correlation of LA with latitude
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2 Ancestral pastoralism Calcium absorption % LA
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3 Lactose lessons on science What is the survival and reproduction advantage of L? Culture historical Ancestral pastoralism Calcium absorption Correlation of LA with latitude Calcium absorption! Calcium absorption Disease barriers to cattle Milk-dependent Pastoralists…
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4 living in very ARID environments… with heavy reliance upon milk for water & electrolytes!
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5 Inuit (Hunter- gatherers) Fresh Pinniped liver! Cod fish But more… New work indicates that there are several independently evolved “L” genes: 1. In Scandinavia (Finland (Finland) 2. Three different genes in Africa: 1. Nilo-Saharan speakers 2. Two among Afro-Asiatic speakers What do these new findings mean?
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Lactose3 - 3 Rival Hypotheses Say cheese! 1. Culture...

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