Animalia-Primates

Animalia-Primates - Human Genetics Humans show a high level...

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Human Genetics Humans show a high level of biological  variability Variation most easily defined by skin color i.e. degree of melanization (melanin pigment) Race :  geographic subspecies Negroid (blacks) Primarily Africa Mongoloids (Browns, Yellows, Reds) Asia
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Skin color Correlated with Latitude   Function of activity of melanocytes Serves protective function against U.V. Sunlight necessary for production of  Vitamin D Hyper- and Hypovitaminosis D
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Skin color Correlated with Latitude   Function of activity of melanocytes Serves protective function against U.V. Sunlight necessary for production of  Vitamin D Hyper- and Hypovitaminosis D
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Skin color cont North =  less direct sunlight   less Vitamin D  less Calcium   leads to  Ricketts therefore lose pigment South   = more direct sunlight more U.V.  burning more vitamin D therefore maintain high  pigmentation
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Human Ancestors Hall: Tree
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Homo neandertalis Discovered in Neander Valley, Germany  1856 Lived in Europe and Middle East 200,000 to 28,000 y.a. Robust body—strong limbs and jaws males  ~  5.5 ft females ~ 5.25 ft Tools – spears fire Buried dead  indicative of some mysticism
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Homo sapiens   The Naked  Ape As an identified species found in Europe  40,000  y.a. Overlapped in time with H. neandertalis for  10,000 years.  Naked skin   Humans:  the only naked  primate Hypothesis:  Aquatic Ape Hypothesis 
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Homo sapiens   The Naked  Ape Hypothesis: Savannah Daylight Hunter – hot tropics Endurance running – leads to over- heating Sweat glands – evaporative heat loss
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Animalia-Primates - Human Genetics Humans show a high level...

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