That's not true.
Its totally coincendence.
I have known one whose mother are by born mentally challenged( like memorization prblm) but they are not.
I have also known one whose mother hold phd degree and father is average ( also mentioned that father have no academic or extra curricular excellence) and son also like his father.
That's obviously for TRP :/
মায়ের জিন থেকেই শিশুর বুদ্ধি বিকশিত হয়, বাবার ভূমিকা নেই