"Inbred" trait shouldn't be inheritable

[blueblimp]

IRL, inbreeding isn't inheritable in the slightest. If two unrelated parents have a child, that child won't ever be inbred. It doesn't matter whether the parents were inbred.

In CK2, inbred is among the most inheritable of all genetic traits, at 25%.

I realize that CK2 is not intended to be a realistic genetics simulation, and there are many other things unrealistic about the genetics system. Even so, it's weird that inbreeding works exactly the opposite in CK2 as in real life.

Here's someone else's reddit post that explains the genetic reason that inbreeding isn't inherited: https://www.reddit.com/r/CrusaderKings/comments/7iet3n/how_do_i_inbreed/dqy8baw/. (BTW, the math behind real inbreeding models is actually pretty simple. Search for "inbreeding coefficient".)

 

[Thure]

If you have genetic deficites from inbreding... your child can clearly inherit them. Of course it didn't work for ALL bad allel but the trait represents a lot more.

 

[blueblimp]

If you have genetic deficites from inbreding... your child can clearly inherit them. Of course it didn't work for ALL bad allel but the trait represents a lot more.

Genetic problems from inbreeding result from matching up two bad copies of the same gene. When having a child, they only get one of those two bad copies, and they (very likely) get a good copy from the other parent. Typically, one good copy is enough. That's why the child won't have problems associated with inbreeding.

(The linked reddit comment also gives an explanation, that might be clearer than mine.)

 

[Atalvyr]

It lines up with the actual science, plus it makes the Inbred trait less of a multi-generational death sentence.