After a drunken night Fiona wakes up to find not only that she has slept with unpopular Joey Dawson but that Liam has eaten an unknown quantity of Fiona's birth control tablets. As a consequence the family is visited by social worker Katrina Webb,an old school adversary of Fiona's,who is also engaged to Joey. When she hears that Joey slept with Fiona she makes it her business to have Liam taken into care,which involves Sheila pretending to be Monica and,amazingly,Frank saving the situation. Ian is off the hook with the Maguires but a comparison of family blood groups show he is not Frank's son. Written by
don @ minifie-1
Did You Know?
The blood groups cited by Debbie do not automatically mean that Frank cannot be Ian's father. She only talks about the siblings, which are AB (Fiona and Liam), A (Carl), AB positive (Debbie), 0 (Ian) and B pos (Lip). The genes for blood groups A and B are co-dominant and 0 is recessive. So if one parent had the A and 0 genes, he or she would have blood group A. If the other had the B and 0 genes, he or she would have blood group B. Either can pass on either one of these genes to each child. So genetically, the children can be A0, B0, AB or 00 and their blood groups would be A, B, AB or 0. The only way Frank could definitely be excluded as Ian's father through blood groups would be if one of the parents had blood group A or B and the other one had AB, but we never learn Frank's or Monica's blood group. See more
References Pulp Fiction