[...lets split up... (OP)]

I was just thinking about hybrids and was wondering, polar bears and grizzly bears can create offspring that have characteristics of both parents, and the hybrids can themselves produce offspring meaning polar bears and grizzly bears are "recently" evolved species.

[diagram=545_0]

The common ancestor is the red block, and the grizzly and the polar bear are yellow and green with the hybrid being "A". If the grizzly and the polar bear evolved two species each that were capable of producing fertile offspring "B" and "C", is it possible for these hybrids to produce offspring?

I know it's unlikely, but i'm not 100% sure, just wanted to know if it's possible.

[Nizzle]

I believe they can.

Look at dogs... Same story (fertile hybrids are produced), a lot more variations of the same species. (however, polar and grizzly are not considered to be the same species anymore...)

[...lets split up... (OP)]

I know, "recently evolved species" is ambiguous and was meant to imply they are two seperate species, not one. Unfortunately i can't use specieses.