Why is my kid not inbred?

[spartanspud]

I've been trying to get a few achievements and decided to marry my sister to accomplish that goal. But my son came out and he isn't inbred. What's the deal?

Scratch that. 2 kids now. Neither inbred.

[galadon3]

inbred as a trait just has a chance to appear, it does represent obvious damage somebody got from the family having intermarriaged too often, not just the fact that the parents where siblings or cousins. So there will always be a chance that the kid comes out just fine, despite its parents being pretty close on the family tree.
The chance gets higher the more interfamily marriages are in the recent generations of its personal family tree.
So if you marry a son and daughter of that couple the chance will be even higher

[Langkard]

Originally posted by galadon3:

inbred as a trait just has a chance to appear, it does represent obvious damage somebody got from the family having intermarriaged too often, not just the fact that the parents where siblings or cousins. So there will always be a chance that the kid comes out just fine, despite its parents being pretty close on the family tree.
The chance gets higher the more interfamily marriages are in the recent generations of its personal family tree.
So if you marry a son and daughter of that couple the chance will be even higher

That is not true. If there are 17 or fewer unique ancestors going back 5 generations, then the chance that the child will be inbred is 100%. See the wiki:

https://ck2.paradoxwikis.com/Breeding#Inbreeding

Now, it is true that a parent with inbred only has a 25% chance to pass it on to a child, 50% if both parents have the inbred trait.

[galadon3]

Originally posted by Langkard:

Originally posted by galadon3:

inbred as a trait just has a chance to appear, it does represent obvious damage somebody got from the family having intermarriaged too often, not just the fact that the parents where siblings or cousins. So there will always be a chance that the kid comes out just fine, despite its parents being pretty close on the family tree.
The chance gets higher the more interfamily marriages are in the recent generations of its personal family tree.
So if you marry a son and daughter of that couple the chance will be even higher

That is not true. If there are 17 or fewer unique ancestors going back 5 generations, then the chance that the child will be inbred is 100%. See the wiki:

https://ck2.paradoxwikis.com/Breeding#Inbreeding

Now, it is true that a parent with inbred only has a 25% chance to pass it on to a child, 50% if both parents have the inbred trait.

*pat on head* fiiiiiiiine boy

try reading in context, just parents close (like what OP did): chance left of kid coming out non-inbred
Inbreeding over generations: chance for inbreeding goes up.

[Manthexxx]

Imagine playing as China and having an inbred.

[Langkard]

Originally posted by galadon3:

Originally posted by Langkard:

That is not true. If there are 17 or fewer unique ancestors going back 5 generations, then the chance that the child will be inbred is 100%. See the wiki:

https://ck2.paradoxwikis.com/Breeding#Inbreeding

Now, it is true that a parent with inbred only has a 25% chance to pass it on to a child, 50% if both parents have the inbred trait.

*pat on head* fiiiiiiiine boy

try reading in context, just parents close (like what OP did): chance left of kid coming out non-inbred
Inbreeding over generations: chance for inbreeding goes up.

I did read it. Try posting what you mean, then... boy. You said

So there will *always* be a chance that the kid comes out just fine, despite its parents being pretty close on the family tree.

Patently untrue that there is "always a chance." There is a chance *UNLESS* the inbreeding goes back far enough so that 17 or fewer ancestors through 5 generations are unique for the child. 100% chance of inbred is the opposite of always having a chance to not be inbred, isn't it? If you didn't mean "always" then why say it? Nice try, sport.

[Meewec]

just bring in a woman from the royal family of the byzantine empire. always seem to end up with at least one inbred child when i do that.

[Jerroser]

I was able to get a couple who produced several kids with that trait with both being the eventual result of several generations of cusines marrying each other. It honestly wasn't intentional, I just kept thinking that it was easier to block external claims (and though my brothers daughter looked nice...).

Then eventually I saw a way to unite with the nearby kingdom that was ruled by the same dynasty through a marriage between my daughter and their oldest son. The plan being that even though it was a normal marraige both parants were from the same dynasty so I could inherit and keep playing. Unfortuantly this plan resulted in what would best be described as a genetic dead end...

[[PBS]RustyFork]

Originally posted by spartanspud:

Why is my kid not inbred?

Something my dad never said...

[L I G H T H O U S E]

Originally posted by Dr. Steve Brule:

Originally posted by broartwar:

if talking about incest isn't CK2 related i dont know what is.

It... was a joke...

I laughed , I thought it was funny

[spartanspud]

I mean. I'm sure if I played long enough I'd inevitably get inbred. That's just what happens in medieval society.

[Someguyinhere]

Originally posted by spartanspud:

I've been trying to get a few achievements and decided to marry my sister to accomplish that goal. But my son came out and he isn't inbred. What's the deal?

Scratch that. 2 kids now. Neither inbred.

It's not 100% in game or in real life. Actually even in real life there's less than a 40% chance that directly related family members breeding will actually produce offspring with redundant genes, aka inbred.

[tilarium]

Originally posted by spartanspud:

I've been trying to get a few achievements and decided to marry my sister to accomplish that goal. But my son came out and he isn't inbred. What's the deal?

Scratch that. 2 kids now. Neither inbred.

Get them to have a daughter, seduce the daughter. If that doesn't get you inbred, nothing will.

[Admod, the Equivocal]

If you were to breed with a sibling in real life there should be no genetic problems unless your children try breeding with each other. Then their children would have some problems. Doing it once in a generation should be perfectly fine though.

[Someguyinhere]

Originally posted by Admod, the Capricorn:

If you were to breed with a sibling in real life there should be no genetic problems unless your children try breeding with each other. Then their children would have some problems. Doing it once in a generation should be perfectly fine though.

It's more percentage based really but the chances are far from absolute. Not that I'm advocating ♥♥♥♥♥♥♥ your sister in real life.


Unless she's hot.

[Malvastor]

Originally posted by Admod, the Capricorn:

If you were to breed with a sibling in real life there should be no genetic problems unless your children try breeding with each other. Then their children would have some problems. Doing it once in a generation should be perfectly fine though.

Your kids with your sister would probably be fine. What happens with inbreeding is that, essentially, we all have genes with bugs in them. But we also have two copies of the genes for just about everything, one from each parent, and usually when one of those copies is bugged our cells can use the other copy and everything turns out fine.

When you're breeding too close to your own genetics, there's a chance that you and your sister will both pass on a bugged gene to your kid- and he won't have anything to correct with. That chance is slight, but still present, on the first generation of incest baby. It increases with each subsequent generation, because no new non-errored DNA is being introduced. Over multiple generations those errors compound and build up and start to manifest, and eventually you get this guy[en.wikipedia.org]. That's the result of a long chain of inbreeding, but note that it's still possible to get something like it after just one generation.