The Xeno, a DNA harvester?

I had read earlier on this site, that the xeno was designed by the engineers as a type of DNA harvestor. The more i think of it , the more the idea makes sense. Just bear with me on this one. A 'being' gets infected with the black goo, from that it gets mutated into a face hugger (type or variation of one) . it find s a host and infects or impregnates another being, then becoming a xeno (type or ariation of one) . the xeno can infect and host or a dead victim ( using the body as material for an egg) thus the whole process starts again. Mean while as it goes through each 'phrase , it collects DNA. Then the engineers just harvest the eggs. *Moderated by Svanya