Probability of passing a disease down to a child or a group of siblings?

[badr]

TL;DR Summary

Let's say 6 %

Hello.

So I got a question about heredity .

Let's say the probability of inheriting schizophrenia is 6 % if one parent is affected.

So i know that for 6 % probability, there is 1.2 kid out of 5 who will inherit that illness .

So is it better not to have kids in this case ?

 

[FactChecker]

TL;DR Summary: Let's say 6 %

Hello.

So I got a question about heredity .

Let's say the probability of inheriting schizophrenia is 6 % if one parent is affected.

So i know that for 6 % probability, there is 1.2 kid out of 5 who will inherit that illness .

1.2 is 24% of 5, not 6%.

So is it better not to have kids in this case ?

This is not a physics or math question.

 

[badr]

1.2 is 24% of 5, not 6%.

This is not a physics or math question.

OK sorry .

So out of 2 kids there's 0.12 % chance of one of them having the condition. I think that's it ?

 

[FactChecker]

OK sorry .

So out of 2 kids there's 0.12 % chance of one of them having the condition. I think that's it ?

Close, but not exact.
Assume that the odds of each child is independent from the other.
Then the probability of neither child being sick is (1-0.06)(1-0.06) = 0.8836
So the probability of at least one child is sick (and maybe both) is 1-0.8836 = 0.1164
That is 11.64%

 

[jedishrfu]

I hope this is purely an academic question as we shouldn't rely on answers from random forums to decide whether we should have kids for fear of passing on some genetic anomaly.

 

[badr]

wrong idea i know