C O N T E N T SSee AlsoDescriptionThis theory holds that each group of migrating humans begat a later, smaller subgroup that subsequently continued humankind's journey around the globe. Each time a subset migrated onward, genetic diversity narrowed. As a result, naturally occurring random genetic variations; also known as genetic drift, increasingly influenced the genetic makeup of gradually more homogenous populations. DiscussionGenetic diversity was found to be lowest in the Americas, which are widely believed to be the last continents settled by humans. |
