So your understanding about gene is that it starts and stops at the parents only!!.... Very limited knowledge that is!
Do you understand what genes do? If you did I really dont think you would have said that it stops and starts with the parents. I'll quickly explain what genes are and what they do.
Genes are basically instructions inherited from the parents. Half the fathers and half the mothers, if a fh's parents dont have koks their off springs wont have koks. Simple as that, your brown and your parents are brown for an example. You dont see purple kids running down the street do you? Back on track, anything that is multicelluar is predestined to be what it is from the parents genes. Sure there could be a differ combination that lead to different looking offspring but its all within a scope local to its own possibilities.
Genes are a combination of instructions so you saying "your understanding of gene is that it starts and stops at the parent only" is true. Your knowledge seems very very limited. In college I took a couple genetics classes and have a very good understanding of genetics..
Correct me if I'm wrong, you are saying after the fh receives its genes from its mother and father it some how alters them within its own body and becomes something it wasnt predestined to be? If so that's a huge load of bull. First thing I was told in my very first genetics lecture is that all muticelluar creatures have been given a blueprint which are the genes that decides length, color, regulatory functions, and the final disposition. I have a hint that you dont really understand what you're talking about..