[HPforGrownups] What determins weither a muggle born will happen?

[Norma Jean Tran]

No: HPFGUIDX 161395

ghost_silver_wolf wrote:
> Is their a genetic factor involved in the muggle family, or is it
> purely random?
>
> I believe there might be a slight genetic factor, the Creevy (sic)
> twins both been wizards.



I've wondered this too, is it genetics or chance? And what if two squibs produce a powerless child? Is he/she also a squib or is that child now a muggle? 
   
NJ