If you'd care to read I considered that possibility and excluded that discussion from this topic. Now would you like to explain cross-species genes in light of your limited explanation of how genes "survive"?
You can't make this exclusion if you are going to make broad statements about all your genes existing in your parents. Obviously if such a "fact" were true, evolution would be impossible, or the mechanisms quite different from what are currently theorized.
Your exclusion is like saying, "excluding the oceans, lakes and rivers, earth is a rather dry place".