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4.1 outline the mechanisms that led to human diversity
outline the mechanisms that led to human diversity
- As humans migrated throughout the world small groups of people would have become isolated by barriers such as mountain ranges or seas. Within these groups the individuals shared a genetic variation that increased their chances of surviving and reproducing. This favourable factor would therefore become common in this group.
- Geographical isolation can lead to differences in gene frequencies. During their migrations across the Earth, humans experienced different climactic conditions which led to the selection of regional differences.