Florizel: "each your doing,
So singular in each particular,
Crowns what you are doing in the present deed,
That all your acts are queens." (Act 4, Scene 4)
What is all of this talk about Perdita behaving royally even though she is a shepherd's adopted daughter? This harkens back to the nature vs. nurture debate that has been going on with developmental psychology, and I think it is pretty obvious that in Shakespeare's time, they were all about nature (that the reason why you do what you do/who you are has to do with heredity) instead of taking nurture (who you are has to do with your environment) into account. I would like to argue that Perdita would have some traits of the royal family of Sicilia, but her actions would also reflect her shepherdess upbringing.