PKU.com Community Discussion Forum Parent support how much is the possibilituy of getting pku from the carrier parents of pku ? Reply To: how much is the possibilituy of getting pku from the carrier parents of pku ?

#8809
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BreaMarie91
Member

Here are the possibilities of the baby having PKU in your given scenarios:

1. 1/4

2. 0

3. 0

4. 1/2

If one parent is not a carrier and does not have PKU none of the babies will have PKU, because both parents need to pass on the mutated gene. There is no way to be certain what the chances of your friend giving birth to a PKU child is, because although her brothers have PKU we do not know if she is a carrier or not. She would only have a child born with PKU if she is a carrier and she marries a carrier.

I hope this helps!

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