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Human Variation

Human Variation - HUMAN VARIATIONlast lecture before Exam...

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HUMAN VARIATION—last lecture before Exam 1 -variation at individual and group level -concept of race -adaptive significance of skin color species subspecies populations individuals term “race” is synonymous with “subspecies” different parts of the same species. the difference in genetic makeup can show the amount of time between two species splitting (the greater the difference the longer the split was ago) as a species, we’re lacking a lot of variation because our common ancestors were a small population from a bottleneck effect race: a group of populations sharing certain characteristics that make them distinct from other groups/populations/ can include both biological and cultural criteria this assumes that humans can be categorized into a number of groups i.e. that there are clear, distinct boundaries defining each race doesn’t work this way. not possible to place everyone in one simple race category. racial categories are constantly transforming and changing. race is a continuous spectrum of close gradations some characteristics are more common in certain global areas the sickle cell anemia gene is more frequent in Africa having one sickle cell allele helps people resist malaria
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