Study reveals two non-inherited genetic factors influencing human 1:1 sex ratio through X and Y chromosome distribution.

A study by University of Michigan researchers Siliang Song and Jianzhi Zhang investigates the human 1:1 sex ratio, identifying two genetic variants affecting it, which are not inherited. Unlike many animals with skewed ratios, humans maintain this balance through X and Y chromosome distribution in sperm and eggs. The findings suggest that evolutionary and statistical mechanisms, along with human monogamy, contribute to this equilibrium, despite high genetic variability.

6 months ago
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