from a genetics study standpoint (iunno if this is the right way of looking at it but maybe some insight) ... buut
when using terms like F1, F2, F3, etc ... its the labels for the generation. So it could be the first generation of offsrping some mix between yorkie+_____ (parents).
Then the offspring from the F1 generations breed and their babies are the F2 generations.
but i would definitely ask the more experienced pple with biewers and partis. |