The genetics of sex-ratio variation have important implications for the evolution of the sex ratio for two reasons. First, additive genetic variance is required for the evolution of any trait, ...

Sex ratio has been studied from many theoretical and empirical perspectives, but a general assumption in sex ratio research is that changes in sex ratio occur because of selection on sex ratio itself.

Ray and colleagues1 present data on variation in birth sex ratios among Ontario newborns, showing a significant male-biased sex ratio at birth among multiparous Indian and South Korean mothers. The ...

Cancer Causes & Control, Vol. 26, No. 5, Special Issue: Breast and Cervical Cancer Early Detection Program (May 2015), pp. 689-695, 697 (8 pages) Purpose: There is substantial variation across the ...