And so what that means is this initial assumption that our disease is sex link recessive does not actually work. So now we eliminated the fact that our disease is sex link recessive, so it cannot be sex link recessive. Now let's now assume that it is. So let's see, assumption number two is it is autosomal recessive. Let's see if that actually works out. So autosomal recessive and what that basically means is the only time that we express a disease phenotype, a phenotype that expresses that disease is when both of those autosomes contain a gene that is recessive.