Board Thread:Theories/@comment-37224578-20181017222452/@comment-46728972-20200911204854

The attack titan's jaw likely wasn't something that arttibuted to it's power but rather Eren's pure titan from. We didn't see this in both Grisha or Kruegar's attack titans. Kruegar also didn't have the pointed elf-like ears. but both Griha and Eren's pure titan from had it. It a unique similarity only they share as father and son, so would this mean a titans traits can be determined by genes to an extent? Given how Eren had the serated jaw and Grisha didn't, wouldn't this mean Carla would have it if she was a pure titan?

If titan traits are genetic, then they likley aren't turned into titans after being injected with the serum, but rather already have that DNA. Perhaps the serum acts like a key that unlocks their dormant titan DNA found in their spines. Their spine may also be dormant parasites like the one that attached to Ymir. It became engraved into her DNA when fusing with her spine and her children had the same DNA in their spine.