Inbreeding Part 2

Medical Topic of the Day: Welcome to part two of my series on inbreeding.  Today we get into the nitty-gritty of what makes it so bad.  Lots of technical details ahead.  I hope I don't F this up too bad.

My Research Today:  Inbreeding is defined as the breeding of closely related people or animals especially over multiple generations.  We saw many examples in part one with sister, brothers, cousins, and sometimes even father/daughter, mother/son breeding.  Besides being gross, what makes it go wrong genetically?

Well inbreeding does not cause genetic mutation as many people think.  What it does do is multiply the chance of a mutated recessive gene being expressed.  Recessive genes are traits or mutations that need to be inherited from both parents for the mutation to manifest in the child.  Keeping it in the family reduces the available genes in the pool making it more likely for this to happen.  Look at it like this:

Poor Selena!

So in this scenario we have Justin Bieber and Selena Gomez and they have kids.  Now the Biebs has a Trollism trait that is recessive (marked by a pink dot).  Selena is genetically perfect.  They have four kids: two Biebs, and two Selenas.  Of those four both Selenas and one of the Biebs inherits the recessive Trollism trait.  Now because none of this second generation has inherited the Trollism trait from both parents the trait does not manifest.

But here is where we have a problem because the second generation of Biebs get freaky with their sister.  So with the third generation the likelihood of the child inheriting the trait from both parents is much higher.  Because of this both kids of one of the pairs are trolls and the other pair produces two more children with the recessive trait.

Selena 3 doesn't even have genitals.

Now this is an extreme example but you can see how each generation of inbreeding compounds the chances of a recessive trait manifesting. And we aren't talking about just one thing, we are talking about many traits that could be compounded over time. It gets extremely complicated. To put it in it's simplest terms inbreeding reduces the available non-mutated genes in a family's pool of genes.

You end up with this eventually.
Now SQUEAL LIKE A PIGGY, BOY!

That is all I am going to get into tonight if you want me to get into it more than just tell me. I hope you all enjoyed and understood that. Have a great night and thanks for reading!

Quest To 180:
10K steps

The MAN:
I don't even know.