A recent genetic study suggests that Neanderthals mostly inherited modern human DNA from the females in their lineage, likely due to mate preferences. Researchers from the University of Pennsylvania found that Neanderthals carried “anatomically modern human” DNA in their X chromosomes, indicating interbreeding with modern humans. This sheds light on the social dynamics of ancient populations.
Comparing Neanderthal and modern human genomes revealed that Neanderthals had more human DNA in their X chromosomes, especially in regions with non-critical genes. The unequal passing of the X chromosome from women to their offspring may explain this phenomenon, suggesting a preference for specific genetic traits in mate selection.
The study also explored various explanations for this genetic pattern, including the appeal of human ancestry in females or Neanderthal ancestry in males. Migration patterns alone did not provide a complete answer, implying a combination of factors such as mate preferences, migration differences between genders, and natural selection could have influenced the genetic biases in Neanderthal X chromosomes.
Additional research has shown potential health implications for Neanderthal-human hybrids, indicating possible negative effects on offspring due to genetic mismatches. These findings suggest that ancient Neanderthals may have adapted their mating preferences based on observed outcomes to ensure healthier offspring.
