Sep 19/12: Diversity
7:49 AM Sep 19, 20...
Mapping Biological Diversity
• Human populations differ in the frequency of alleles, not by the presence of absence of certain alleles.
• While some alleles produce discrete variation, many produce continuous variation
• Continuous: height, could comeup with catagories
○ Ex. 4-5 groups of skin color howeverwithin these colors there are many variations
○ This poses a problem because the researcher has to create the catagories
• Discrete:reletivelyfew variations and recognizable
○ Ex. ABO blood types: People with blood type A are quite distinguishable from blood type B
○ The problem with discrete variation is that there are actually quite few variations
• We have to find "what makes them different" in populations
• Mapping the distribution of these alleles generally produces clines
• Clines are gradual cha