Genetic Shifts and Upright Walking in Early Humans
Scientists have discovered that two small genetic changes contributed to the development of bipedalism in early humans.
These genetic shifts affected the human pelvis, specifically the ilium, which is the bone that hands rest on when placed on the hips.
The rotation reoriented the muscles that attach to the pelvis, turning a system for climbing and running on all four legs into one for standing and walking on two legs.
- Changes in gene activity reshaped the human pelvis, laying the foundation for bipedalism.
- The genetic changes differentiated the human pelvis from those of primate relatives.
Author's summary: Genetic shifts enabled early humans to walk upright.
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