There is and was no need for any crossbreeding between species for there to be descent via evolutionary processes.
The closest relative to a human in DNA is the chimpanzee, and the closest relative to a chimpanzee in DNA is the human being. Humans and chimps are closer to each other in DNA than either is to a gorilla. The endogenous retroviral markers show the evidence of our common descent.
Evolution as a model, explains these observations.
Creationism does not.
This thread is not about creationists, its about the latest ‘missing link’. So if you cant defend your ideas without that as a strawmwan you dont really have an argument.
BTW talkorigns and other evolutionist websites describe their tactics for attacking creationists, so when people as yourself engage in that, its easy to recognize.
So what is the second closest relative?