Quote:
Originally Posted by CyberSEO
No she's not. This theory has never been proven. What about DNA of people we are kissing with? What about DNA of people who were a blood donors? What about DNA of animals that bite us? The reality is very simple: our immunity kills every non-native (external) DNA. That's why people with transplanted organs are on immunosuppressive drugs for life. |
Your immune system responds to protein markers, not DNA. Granted, foreign DNA is typically wrapped up in foreign protein, such as the cell coat of a virus, but it's that cell coat your immune system recognizes and targets the cell for lysis and removal. Get that DNA into a cell, and as long as it does not interfere with the health of the cell, it is likely to remain. Scientists have been introducing non-native DNA into plant and animal cells for years. It's the basis of Gene Therapy.
On a related (no pun intended) note, lots of female insects store the viable sperm of their mates and can continue to have offspring from just that one union for the rest of their lives.