harry potter - Does the Polyjuice Potion Dark Mark work?

I was just reading Harry Potter and the Deathly Hallows, and I was wondering, when Hermione Granger changed into Bellatrix Lestrange, she should've obtained the Dark Mark, temporarily.

Now, my question is: would the Dark Mark work if pressed?

Answer

Would there have been a Dark Mark?

I'm inclined to say yes. When Barty Crouch transformed into Moody, the transformation removes the limbs and body parts that have been severed. So the potion does seems to include external modifications to someone's physical appearance, not just a clone based on their DNA or something like that.

More to the point, when Ron drinks Polyjuice Potion to transform into Harry, he says the following:

"I knew Ginny was lying about that tattoo,” said Ron, looking down at his bare chest.

...which is a pretty good indication that tattoos are included in the transformation. He was, after all, standing next to Hermione, who no doubt would have leapt to correct someone's deficient knowledge of magic.

Would it work? I don't think there's enough evidence in the books to say one way or the other. But my guess is no.

As an analogy, we can assume that the Seven Harry Potters all had Harry's scar, or else the plan would have been worthless. But obviously, not all of them were screaming in pain or losing consciousness when Voldemort approached them. All of them received the external properties of Harry's scar, but certainly not the magical powers associated with Voldemort's soul.

Here's the description of the Dark Mark from Snape:

"There," said Snape harshly. "There. The Dark Mark. It is not as clear as it was an hour or so ago, when it burned black, but you can still see it. Every Death Eater had the sign burned into him by the Dark Lord. It was a means of distinguishing one another, and his means of summoning us to him. When he touched the Mark of any Death Eater, we were to Disapparate, and Apparate, instantly, at his side.

Given that the Dark Mark gives the wearer the ability to instantly know Voldemort's location, and is created personally by Voldemort, I doubt the Dark Mark's power would be duplicated so easily. If so, it would have been child's play for an Auror to be constantly transformed into a known Death Eater, wait for a general summon, and Side-Along Apparate an elite Hit Squad to Voldemort's location. I just think Voldemort's far too clever for that.