So I've seen a lot of people taking for granted that Vanessa is William Zane's (WiAB MC) daughter (including
Vidal the king of Pervert). After all they both have heterochromia (different eye color) and we were told Vanessa's mother cheated all the time.
Right? So I did a little research and observation.
This is Will with her twin sister Leia:
Why this picture specifically? Because it's quite rare for twins to have different eye color.
Heterochromia is a genetic defect of ONE eye. So we can establish that Will's normal eye is the brown/yellow one, just like her twin sister, while the defective one is the blue.
Now, let's see Vanessa.
Not gonna lie, I've a hard time guessing what is Vanessa's normal eye and what's the defective one.
Zara and her father Nick have light blue eyes, but one or both of them might not be related to her according to the theory.
I would still go with the lighter eye being the normal and the darker one being the defective one though, but that's just my opinion.
Why is this relevant? Because an heterochromia that causes a lighter eye color (as in Will) and an heterochromia that causes a darker eye color (as possibly Vanessa?) are two different conditions that have nothing in common, and one cannot be inherited and be the cause for the other one.
Anyway, thank you for coming to my TED Talk.