Tongue rolling

[yaredndoya]

is tongue rolling a genetic trait?

 

[Flammable]

Thts genetic trait

 

[Gorgeousmimi]

It is genetic..I can`t rolle my tongue but my sister can :smile-big:

 

[Kongosho]

Unataka na wewe? I can roll, remove, round round, rudisha my toungue.
Changamka, waweza pata mtoto

 

[Gaijin]

Is nail biting a genetic trait?