Board Thread:Speculation House/@comment-24.247.91.107-20140511154823/@comment-4010415-20140725191731

24.51.64.107 wrote: Not even counting that genetics means that Ruby and Yang could look nothing like their parents or each other, but you can find that they have traits similar to some people way down their family tree.

I have a cousin who has green eyes and curly hair. Everyone else in the family has straight black hair and brown eyes.

Turns out we have a great grandmother who had green eyes.

Genetics only come out when their the dominant. Too many people rely on the 'They look alike thus they must be related/ they don't look alike so they must not be related' crutch. ^ Exactly, this! So many people never consider the fact that some genes are recessive and thus do not show up if there's a more dominant version present! Brown eyes tend to be dominant over blue eyes. If both parents have brown eyes but carry the recessive gene for blue eyes, the child can be born with blue eyes.

Though, of course, some genes can only manifest if they're manifested in both parents. I think the blood type O is like that.