Yes, there can be genetic markers in your biological line that can increase the chance of your being more psychically inclined than others. My family got run out of Germany a few hundred years ago for continuing to mingle with (hehe) and offer sanctuary for the traveling gypsy tribes that passed through.
While mongrelizing in America for some generations slowly bred a lot of psychic ability out of the family line I seemed to be a recessive throwback. I ended up being much darker in completion, much shorter and with some of the old rumored abilities from family legend. (Which regrettably led to a lot of outcasting from the clan)
There are also the Spirit markers that might not be as easy to trace, but it seems that the spirit itself can carry some aspects of this to a new earth suit even if it comes into a family that does not carry the physical genetic abilities. If you try past life regression, you may find you have been this way before and that this is what your current life path wants of you.
However you acquired the ability, be happy in your witchiness, if there had not been several thousands of years of dogmatic persecution of those with more than mundane abilities it would still be more prevelant and not so risky to be "different".
But as previous posters have pointed out. We are on the rise again and hopefully can maintain the brightness of spirit that will help pull this world out of the messes the "mundanes" have gotten it in.
"If it harms none, enjoy as you will!"
Peace
