Comment by dredmorbius

The technical term for a sexual dimorphic bodyweight delta would be a bimodal distribution.

https://en.wikipedia.org/wiki/Bimodal_distribution

Fascinating bit about selective breeding to reduce the difference though.

Then there's the bit about white meat to the US, dark meat to Russia.

http://www.slate.com/articles/life/food/2011/01/the_dark_sid...