Why are kids of older dads at higher risk for mental illness?

Poor sperm cells.

Ever since it was first observed that the children of older fathers are at a higher risk for psychiatric disorders, those tadpole-shaped cells have taken the blame because they can accumulate harmful new mutations. But research published Monday suggests that those accusations may have been false.

Instead, the main culprit might just be plain old, conventional patterns of inheritance — although there could be many elements at play.

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