You probably wouldn't have an intrinsic motivation and desire to be a biologist. You just happened to pick up technology, thought it was cool and enjoyed it.

Besides, humans tend to do things they are forbidden to. Your parents didn't stop you from studying "tech-related things" did they? Well, maybe they did but they must have stopped it once they knew it was futile. Otherwise you wouldn't be what you are now.

If your parents tied you up, beat you up etc. to forbid you from studying tech, then that's an environmental factor. Them not doing so is also an environmental factor.

Believing something is predestined is bullshit. Genetics might give you a better memory, but it doesn't make you a hard worker. Your success depends on your values, priorities and motivation to do so.