biological vs perceived fathers

Factual Questions
1

I’ve heard that biological research on groups (either large families or social groups) frequently find that about 13% of the children could not be the children of the father that was claimed for them. (One article I remember said there was a 10% difference by blood type which was calculated to represent a true rate of 13% if they factored in the instances where the biological father had a similar blood group to the perceived father.)

But I can find no cites to support this. It may be a vocabulary problem. Using the word illegitimate brings up lots of information about out of wedlock births, which isn’t exactly the same thing.

Is there a technical term for instances and/or children where the biological and perceived father are different? Or does anyone have cites about studies of, shall we say, misalignment rates?

I’m just curious about how closely it’s possible for humans to approach monogamy. Improved or additional keywords would be appreciated.

2

We’ve discussed this before. There was one study that indicated that, in that particular study, 10% of the supposed fathers weren’t the real fathers. That was only one study though, and it appears that no one else tried to replicate this experiment. Who knows what the real rate is?