i doubt the xenomorphs are descendants of mutated humans..heres why

the alien in alien and aliens looked human like and was bipedal because the alien gestated inside a human host..aliens 3 the alien gestated in a dog and thus ran on all fours and was dog like...people have said that in alien there is a deleted scene in which a cocooned dallas is turning into a xenomorph..this is not what is happening in aliens the colonists are also cocooned. the aliens cocoon them as living hosts around a facehugger egg so that the hatching face hugger has an immediate host. still we do see the humans in the trailers mutating and attacking one another...who knows what the hell is causing this they are like rabid zombies. we see the one guy in the space suit pouncing at somebody and he clearly has super amplified strength..also the rabid woman that we see collapsing is wearing white pieces of cloth meaning she is either in some hyper sleep hibernating outfit or she was examined in a med lab prior to her killer mutation..perhaps she came into contact with the mutagen that is used to make the xenomorphs perhaps a fluid within those urns...say when we see that person with acid gas in their helmet and perhaps that fluid is what causes him to be able to pounce and attack. maybe its a fluid or gas that makes the xenomorphs so vicious..some chemical used in their dna like a steroid which causes the humans that have come in contact with it to become vicious killers