I just wondered if instinctive behaviour can be passed on genetically OR is it environmental OR is it a mixture of both?

 

If it is a mixture of both environment and genes passed on from its parent, does it show that gradual accumulation of mutations is not the mechanism for evolution of instinct?

by definition, instinctual behavior is genetic. But it can be difficult to distinguish genetically programmed behaviors from behaviors learned at a young age.

Thanks there e.c. The implication is from your reply, that a genetic change or mutation may change instinctive behaviour. this is quite important. Have you any papers/reviews that back this up?