Vampires and Werewolves, now this is a concept I've been considering. In the game, the Dragonborn (your character) can, with the right add-ons and downloadable contents, be transformed from their regular race to vampire or werewolf. Both races have advantages and disadvantages, as well as special weaknesses and strengths. A wood elf has just as much possibility to be transformed as an orc, and so on. I have finally come to the conclusion that you may have a vampiric / wolven character.

Now there are also questions about half-breeds. From the Elder Scrolls Wiki, and parts of the game, I have come to the conclusion that a human race (Redguard, Imperial, Brenton, and Nord) can have children with other races. This would give the child traits both physical and skill wise of both races.

Each race has a special skill or power. Half-breeds will take the power of their more dominant race, for example: If the character is a Nordic Argonian with more traits of an Argonian, they will have the ability to use the Histskin power, not Battle Cry.

So, it is possible to have a Nordic Argonian, but it is not possible to have a Argonian Khajiit. One parent must be a full blood human, and the other a full blood of the other race. If either of the parents are half-bloods, the child will end up being human.