A recent genetic study suggests that Neanderthals mostly inherited modern human DNA from the females in their family due to mate preferences. The University of Pennsylvania researchers analyzed the X chromosomes of Neanderthals and found a higher percentage of human DNA in these chromosomes compared to others. The study implies insights into the social behavior of ancient populations.
Neanderthals, who lived in Europe and Asia, interbred with modern humans from Africa, resulting in the presence of Neanderthal DNA in non-African human ancestors. The researchers focused on the X chromosome, which showed a significant amount of human DNA in Neanderthal women compared to their autosomes. This unequal distribution could be explained by preferences in mate selection, where human genes on the X chromosomes may have been more advantageous in Neanderthals.
The study suggests that the unequal passing-on of the X chromosome, coupled with preferences for certain genetic ancestries, could explain the findings. Various factors like mate preferences, migration patterns, and natural selection might have influenced the biases observed in Neanderthal X chromosomes. This explanation aligns with previous research indicating possible health implications in Neanderthal-human hybrid offspring based on genetic mismatches.
The study’s findings shed light on the intricate dynamics of ancient populations and how genetic interbreeding influenced evolutionary outcomes. Further research is needed to explore the complexities of Neanderthal-human interactions and their genetic legacies.
