Differences in the 2nd to 4th digit length ratio in humans reflect shifts along the common allometric line.

@article{Kratochvl2009DifferencesIT,
  title={Differences in the 2nd to 4th digit length ratio in humans reflect shifts along the common allometric line.},
  author={Luk{\'a}{\vs} Kratochv{\'i}l and Jaroslav Flegr},
  journal={Biology letters},
  year={2009},
  volume={5 5},
  pages={643-6}
}
Ratios often lead to biased conclusions concerning the actual relationships between examined traits and comparisons of the relative size of traits among groups. Therefore, the use of ratios has been abandoned in most comparative studies. However, ratios such as body mass index and waist-to-hip ratio are widely used in evolutionary biology and medicine. One such, the ratio of the 2nd to the 4th finger (2D : 4D), has been the subject of much recent interest in both humans and animals. Most… CONTINUE READING
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