Liquid Snake is the superior clone. He has the dominant genes. Solid Snake is the inferior clone. He has the recessive genes. Alright, that's simple enough. Now, it is official that at one point, both Solid and Liquid Snake had blonde hair. This is evident in the MGS Briefing files in the PS1 game, where Solid Snake is clearly blonde. He then dyed and cut his hair before Shadow Moses so as not to be confused with Liquid. Originally in MGS2, Snake was going to revert back to his normal hair color, but the staff decided against it. They argued that people identified Snake with his brown hair, and for most it wasn't common knowledge that he was originally blonde. So now it's pretty much accepted that Snake has brown hair. Brown hair is a dominant gene, whereas blonde hair is a recessive gene. So why is it that Liquid (dominant) has blonde hair and Snake (recessive) now has brown hair? I know absolutely nothing about DNA/genetics, so someone please explain.