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This study investigated, through large-scale statistical analysis of the global population, whether the human sex ratio is skewing worldwide, and if so, why and how it shifts, and the impact of any shift on human reproduction. A significant imbalance of the sex ratio was observed in the whole human population, resulting in a vicious circle where the more boys born, the more infertile men occur as...
The upstream regulatory region of the human thymidylate synthase gene (thymidylate synthase enhancer region, TSER) is length polymorphic, attributable to variable numbers of tandemly repeated copies of a 28-bp fragment. It has been found that TSER length polymorphism is correlated to malignancy risk. To further our understanding of the origin and evolution of TSER, this region was investigated among...
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