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What makes two species different? The role of selfish genes in distinguishing a species
- January 05, 2019
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For most of the 20th century, scientists believed that the reproductive incompatibility between species evolved gradually as a by-product of adapting to different environments. New research has shown there are more factors at play -- specifically the presence of 'selfish genes,' whose flow among species may dictate whether two species converge or diverge.