AD Binding Questions….

Hi Guys, I am looking @ moving my Mac's guys from their local setups to an AD/OD environment. However, me & the PC NW Admin have been having a few arguments & he has raised a few queries that I could do with a little clarification on: 1) When binding a Mac to an AD domain does it create any entry for that mac in DNS? (as in Dynamic Name registration). 2) If a user has a PC AD profile (for use on Pc's) & a Mac Hosted profile (hosted on an xserve & for use on Macs) do the repective computers look for the respective profiles? That'll do for now!