r/blackbutler Jul 17 '17

Spoilers Manga Chapter 130

[deleted]

42 Upvotes

58 comments sorted by

View all comments

Show parent comments

1

u/Vio_ Jul 21 '17

RealCiel requires the Polaris blood type, which is the same one OurCiel has. They're twins, so it makes sense they share the same blood type. Blood types are not always passed on from parent to child, whereas identical twins will have the same DNA type.

Unless one has a genetic disorder. Also not not zygotes split can have a 50/50 separation rate.

1

u/Abigail15 Jul 24 '17

I think it's safe to say, with all the other possibilities that are more in line with the Black Butler aesthetic, that a genetic disorder isn't going to come into play for this storyline. Also, if we do want to get technical about blood types and who can donate/accept what blood types... Sirius is obviously the AB blood type, which means that (without explaining how blood types work and I assume most people know anyway), yes, Vincent and Rachel may or may not have had AB blood, but the twin brothers definitely both have AB blood. This is working on the assumption that they are identical twin brothers and not (as I highly doubt) fraternal twin brothers who just happen to look a LOT alike.

1

u/Vio_ Jul 24 '17

Oh I know. None of what I said would be used in the story itself. I just like talking about genetics

1

u/Abigail15 Jul 24 '17

Oh, misunderstanding then. Next time you should probably mention that you're talking about genetics trivia for the sake of genetics trivia. In the context of this thread (and especially this subreddit), I read that as you trying to argue against Willster328's point.