April 11, 2015

Nanoha Vivid -- Engineer's disease

Just a small problem here. This is Vivio:



And that was the person in ancient Belka from whom Vivio was cloned, recognizably so because they both have exactly the same Heterochromia.

And that's the problem: heterochromia isn't heritable. It isn't caused by a gene. The most common cause of heterochromia is chimericism, which happens when two fertilized eggs merge and result in a single individual.

If you take a single cell from someone with heterochromia and clone it, the resulting baby's eyes will be the same color, one of the two the parent had. (Which one depends on where the cell came from.)

Not that it matters, except that it's a plot point in Nanoha Vivid -- or it will be. Einhart is going to recognize Vivio by her eyes.

Posted by: Steven Den Beste in Engineer's Disease at 03:09 PM | Comments (9) | Add Comment
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1 Belkan DNA is different like that? 

Their cloning process is so awesome it even got the various chimerical parts back in the same places?

...something something "eye color" something something "linker core".

Posted by: Mikeski at April 11, 2015 03:37 PM (aLP9q)

2 I think there's more than one form of heterochromia.  It can be due to chimericism, but the most common form in cats and dogs is heritable.  It's quite common in white cats and in Australian shepherd dogs, for example, where chimericism is relatively rare.

Posted by: Pixy Misa at April 11, 2015 06:12 PM (PiXy!)

3 Yup.  My brother has two Aussie Shepherds, who have one blue and three brown eyes between them.  The heterochromatic one was born with blue eyes, but only one darkened.  She was what I had in mind for my "DNA" handwave, actually.

It makes my sister-in-law mad when I call that one "boat lights".  (Vivio has real boat lights; red on the left and green on the right.)

Posted by: Mikeski at April 11, 2015 07:11 PM (aLP9q)

4 I stand corrected.

Posted by: Steven Den Beste at April 11, 2015 09:26 PM (+rSRq)

5 Huh. Einhart's also heterochromic, as was Ingvalt. Anyone remember if they mentioned Ixy's eyes one way or the other?

Posted by: Avatar_exADV at April 12, 2015 12:02 AM (zJsIy)

6 Avatar, you mentioned previously that some of the information in this series comes from the drama cds or radio plays, IIRC.  Are there translations or fansubs or at least summaries that you might be aware of?

Posted by: Ben at April 12, 2015 07:02 AM (xNPol)

7 There are summaries in the Nanoha Wiki.

Posted by: Steven Den Beste at April 12, 2015 07:08 AM (+rSRq)

8 Or not. Sorry.

Posted by: Steven Den Beste at April 12, 2015 07:22 AM (+rSRq)

9 I remember coming across a summary ages ago, but I think it was on the animesuki forum. I actually did find a summary of the sound stage X on that wiki, Steven (link here).

That said, I checked the official art and there's at least one shot of her with two green eyes, so I guess it's not something shared by all three of 'em.

Posted by: Avatar_exADV at April 12, 2015 12:13 PM (zTHWs)

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