00:01
This question presents us with a pedigree chart and we are asked to determine what pattern of inheritance explains the transmission of the trait.
00:11
So we see that both males and females have this trait.
00:19
We see that starting at the very first generation, the male does not have the trait the female does.
00:24
But we see that the children do not all have this trait.
00:32
So therefore we know that it's not x -linked.
00:37
We see that this is not something that is a sex -linked trait.
00:44
And then to determine if this is autosomal recessive, dominant, or is this incomplete dominant, what we can say right out of the gate that it's not incompletely dominant, because incomplete dominance is when you have two dominant traits that make a third phenotype.
01:03
So essentially having two dominant, two different alleles can be dominant and they make a third phenotype.
01:09
So we don't see that here.
01:11
So we can eliminate sex -linked dominant, sex -linked recessive, and we can also eliminate incomplete dominance...