So so far we discussed pedigrees that describe diseases that are sex link recessive. We also looked at those pedigrees that describe autosomal recessive traits. Now let's take a look at the following pedigree that will describe autosomal dominant traits. So what we want to basically show in this lecture is that whatever the disease is that is described by this pedigree, it cannot be sex linked dominant and it cannot be sex link recessive. And we want to show that this could be autosomal dominant. So show that a disease described by the following pedigree cannot be sex link recessive and sex linked dominant.