Why we need sex?
because we need the difference and fast mixing of genes.
Followed by the selection of the fittest.
Neolithic woman
![](http://www.sandrashaw.com/images/AH1L01VW3.jpg)
Neolithic man
![](http://northernblue.ca/cconline/images/ancient/hunting.jpg)
![](http://www.sahara.it/bm/saharaThree/moxiepix/b7_832.jpg)
- High
- Muscle Proteins synthesis
**
- Low
- Fatty acid synthesis
- Chetogenetic AA
Today
![](http://www.talbotcentral.ucr.edu/AAA_03_research/AAA_03C_research/HumanSperm+Egg.jpg)
AA
Lysine
Lysine is also important as a precursor for the synthesis of carnitine, required for the transport of fatty acids into the mitochondria for oxidation.