Aeon's ago long before the human race, a race of extratarsal beings known as the space jockeys built a living bio mechanical organism that was used as a weapon these creatures are know as the Xenomorph they were built to be the perfect living organism. Concentrated acid for blood, bio mechanical exoskeleton armor plating, a seconde inner jaw that can pierce through and living organizum, fermion vision, a long deadly tail, the ability to scale walls and a long adult life span .
The space jockeys created what was know as the facehugger parasite that can attach it self to a host-victims face and then it will lay and embryo into the victums chest cavity from there the facehugger will die off and a new life will begin by taking 40% of the victums characteristics and leaving 60% xenomorph the creature will hatch out of the victums chest thus giving birth to a new beginning. the creature now has some of the characteristics of it's host and now it is twice as powerful and ready to take out any more living host as which it has derived from. making the Xenomorph Transbreed a more powerful killing machine, a surviver.
Once the creature has become well safe and aware of it's surroundings it will molt into it's final Stage the Queen an egg Layer it becomes four times bigger and four times stronger so it can protect it's very existence, to lay eggs so it can have a colony of drones and warriors an Army of helpers. The transbreeded orgainsum will still lay normal eggs and from the eggs normal facehuggers will hatch. The transbreed is the cross gene bettween the xenomorph and it's host but once the transbreed becomes an Egg layer, the process starts all over again you will get normal facehugers. You see the transbreed DNA is only used for the individual xeomorphs surivial mechanism. Become the enemy to kill the enemy