i read on wikipedia that a female dragon will lay eggs but the will not alwase be fertilized but i guess its possible that even after the male is removed that she can retain sperm and fertlize the eggs i dont understand it i read it on wikipedia. if i were you i would look on a few othere sites and some books befor i use this for somthing.

Yes, its a rare coincedence that can happen with some amphibions, reptiles and fish. A female bearded dragon CAN lay eggs that are "fertilzed" without having to mate but under extreme circumstances. which is called "Pathenogenesis."
But all the offspring will be male because of self-fertilization in lizards. When the offspring reach the age of sexual maturity the mother will be able to mate with her offspring and and reproduce more children who will reproduce with their siblings, uncle's and possibly mother.
This process is usually found among small invertebrates though such as plant lice or plankton that consist of animals like coral, jelly fish, sea anenomeas ect.
But all in all, yes it is possible.