Genetic Diversity and Distance from Africa It is hypothesized that humans origin

Question

Genetic Diversity and Distance from Africa It is hypothesized that humans originated in East Africa, and migrated from there. We compute a measure of genetic diversity for different populations,66 and the geographic distance of each population from East Africa (Addis Ababa, Ethiopia), as one would travel over the surface of the earth by land (migration long ago is thought to have happened by land). The relationship between these two variables is shown in the figure below and the data are given in GeneticDiversity. AFRICA MIDDLE EAST 8 EUROPE o CENTRAL_SOUTH _ASIA EASTASIA - OCEANIA AMERICA 5000 10000 15000 20000 25000 Distance from East Africa (km) 1Calculated from data from S Ramachandran, O Deshpande, CC Roseman, NA Rosenberg, MW Feldman, LL Cavalli-Sforza

Explanation / Answer

a) Yes there is association

negative (as distace is inversely proportion to diversity)

strong (as values are closely spaced)

linear (as almost on line points)

b) as correlation is strong and negative is should be close to -1.

Thus, r = -0.83

c) America

d) America

e) closer to East Africa

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