12._Human_diversity

12._Human_diversity - Human variation Evolution in Action...

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Human variation Evolution in Action: Modern Human Populations Human Polymorphisms Is the Concept of Race Useful for Studying Human Physical Variation? Are There Difference in Intelligence From One Population to Another? Why ask this question?
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The Adaptive Significance of Variation Human variation is the result of adaptations to environmental conditions. Levels of response to environmental change: Long-term (i.e. genetic) evolutionary changes characterize all individuals within a population or species. Short-term physiological response to environmental change is temporary.
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Some Physical Variables Body build Skin color Eye color Nose shape Wide flaring nose and tropical climates Hair type Skull shape Lip type
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Skin Color: a Case Study in Adaptation Race in the U.S. often equated with skin color Skin color shows great variation Four factors: 1 Transparency of the skin 2 Carotene 3 Reflected color of blood vessels 4 Melanin
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The Meaning of Race Early attempts at racial classification Based on geography and physical traits Problematic Modern understanding Rejection of trait-list approach Adaptation of populations
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The Concept of Human Races The concept of race has
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12._Human_diversity - Human variation Evolution in Action...

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