So what do we get? Well, we have X uppercase B and Y. So from this individual we have X lowercase BX, lowercase B. And so when we cross, we get X uppercase B, lowercase BX, uppercase BX, lowercase B, and right away we should see that that's a problem. And that's a problem because we form this female right over here. So according to the pedigree, we have this female individual that contains both lowercase B's on both of those X chromosomes.