Investigating why humans are susceptible to disease.

Additional mutations causing lactase persistence were discovered by studying different groups of people around the world. The following table summarizes the percentages of two of these mutations in the seven geographic regions.

Are the mutations spread out evenly or do they appear in clusters? What do you think this means?

Geographic region Mutation 2 (%) Mutation 3 (%)
West Africa 0 0
East Africa 26 2
Middle East 1 0 0
Middle East 2 0 56
East Asia 0 0
Northern Europe 0 0
Southern Europe 0 0

Return to main menu for Evolution and Medicine