User blog comment:Zathronas/Speculative author: My top 13 Questions for Volume 3/@comment-78.42.186.25-20141026203754/@comment-3146930-20141028053651

But you are more likely. I mean you are more likely to share the eye color of one of your parents unless they both carry a recessive gene and then you have a slim chance of having that color. So if Pyrrha's grandmother and great-great-grandfather could control metal, there is a chance that gene was eventually passed down to her.

As far as a Semblance changing over time, that is hard to say. Ruby and Oobleck seem to share the same super-speed, but Oobleck is already a full Hunter and much older than Ruby, but his ability doesn't seem to have advanced at all. Glynda as well appears to be able to move things, but there isn't really anywhere to go from there except maybe being able to move more things over time. Other characters as well seem like there isn't much more to expand with, like Pyrrha, Yang, or Weiss. They could get more inventive maybe, but I don't feel it will change.

But of course this is all speculation.