That is if the Queen is pure however, Requiem shows that Queen do take traits as well, I don't have a problem with that but the execution was left to be desired.
Not bad theory though.
Just checked wikipedia, I thought I heard this before as well, I just needed to be sure but an adi member explained about the Resurrection Alien legs.
"Aliens have been alternatively portrayed as both plantigrade and digitigrade organisms, usually in accordance to their host. Human-spawned Aliens were usually portrayed as having humanoid hind limbs, while in Alien 3, the featured Alien sported double-jointed legs due to its quadrupedal host. This characteristic would be continued in Alien Resurrection for the human-spawned Aliens. Tom Woodruff, who had previously played the "dog-alien" in Alien 3, described the human-spawned Aliens in Resurrection as feeling more like a dog than the previous creature, despite having been born from human hosts. The human-spawned Alien warriors would revert to a plantigrade posture in Alien vs. Predator."
Well, I think that is the worst explanation ever