00:01
In order to answer this question, let's talk about pedigris.
00:03
This question says, what is a pedigree and how are pedigris for dominant and recessive traits represented? so a pedigree is a table or at least showing the line of ancestors of a person or an animal in general.
00:14
Okay? so that's a pedigree.
00:16
And now, you have recessive conditions and also dominant conditions.
00:21
And how do dominant and recessive conditions are represented in pedigris? well, in dominant conditions, or well, in pedigree in general, a circle represents a woman and a square represents a man.
00:34
Okay? so let's suppose that this couple has three children.
00:40
Okay, and these children grows up and he marries a woman and they have two daughters and this daughter mates with another man and you have here one daughter and one son, this song made with another daughter and so on like this.
00:58
Okay, something like this.
00:59
And in this case, they suppose that this man also married with a woman and you have a daughter and a son, then this woman meets with a man and they have two songs.
01:13
And in this case, this song made with a woman and so on.
01:19
I'm just trying to expand this family, okay, as much as i can.
01:24
You have two doors, then you have here three, two sons and one daughter.
01:32
Something like this, and like this.
01:37
And finally here, she married with a man and have two daughters and like this.
01:47
Now, this is an example of a pedigree, for example, like a little long pedigree.
01:53
Okay? now, how is the, or how can you represent a dominant trade in a pedigree? well, a dominant trade remembers that it is enough to have one mutant allele in order to express a disease.
02:05
So practically a dominant pedigree would look something like this.
02:12
This woman has a disease, and the disease is going to appear in almost all the generations.
02:18
For example, it can appear here, or this woman can be affected.
02:22
Also, this man here can be affected, and that's it.
02:24
Then this woman can be affected too.
02:27
Also, this man here can be affected...