00:01
We're looking at cystic fibrosis.
00:03
Can it be inherited and how? so cystic fibrosis is a genetic disorder and it is autosomal, recessive.
00:14
So what this means is it's found on an autosome, so not a sex chromosome, and it is recessive.
00:21
So if we label two alleles, the dominant is normal, the recessive is the cystic fibrosis.
00:30
And everybody gets two copies of each gene except sex -linked ones.
00:36
So everybody has two copies of this gene.
00:39
You might have two copies of a normal.
00:41
You might have one of each.
00:43
You might have two copies of the cystic fibrosis.
00:45
The only way to get the condition is to have this.
00:49
These people have the condition.
00:53
If you only have one copy, you don't have the condition, but you are a carrier, which means you can pass on this to your offspring.
01:01
What this means is in autosomal recessive conditions, you can have two parents who don't have the condition but their child does.
01:11
So two carriers can have an affected child...