Soybean-- Human or Sayia-Jin?

[Hellfighter 17]

Originally posted by Bardock
If you are referring to my last sentence, I simply stated that a hairstyle like the one Goku has could be a common trait among low-level soldiers. I left out the part where I would have said something along the lines of "it's genetically pre-determined and once it grows out does not change" because I thought that was self-explanatory. So, since the low-level warrior caste may share similar genetic characteristics, they all could share similar hairstyles.

Does that clear it up?

A logical reasoning for why they could gain the same hair style due to being in the same caste is because of breeding, which would make them relatives. It's just like natural selection, where certain traits are carried on in genetics.