Julie also has Factor V Leiden. David's doctor told him that he had it just a few months ago. That makes all of you Leonard children except for Shawn and Kirsten. AnnMarie hasn't been tested.
Given that this disease displays incomplete dominance, those who are homozygous (two parents) for the mutated allele are at a heightened risk versus those that are heterozygous (one parent) for the mutation.
Only 50 percent of the kids in a family (where there is a single zygote) should get it. Julie's doctor had to be funny--he said that I was most likely supposed to have had two more kids. There were probably two angels in heaven who would have come to the family and not had it. ;)
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