Blk Tan

Is it ok to breed a white male to a blk/tan female german shepherds and they are registered?

Is it ok to breed a white male and a blk/tan german shepherd together? they are both akc registered and both are german shepherds.

Anyone who has to ask breeding-type questions HERE doesn't know enough to attempt to be a breeder, and doesn't have stock worth breeding from.
Get yourself a high-quality mentor, and start LEARNING.

The AKC is the only Yank registration body that the rest of the world accepts, but it is nevertheless lousy, ignoring internationally-agreed Breed Standards, and registering without question ANYTHING for which the right fee has been paid and that has 2 alleged-parents that are in the same breed's register.

In Australia, Germany, and many other places, a white pooch can not BE registered as a GSD, and so it cannot have pups registered, either.
THAT should be enough answer to your question, provided you are actually thinking about the GSD breed. Click http://pets.groups.yahoo.com/group/The_GSD_Source/links/Defining_a_GSD_001261993982/ to discover the full set of proofs, tests & certificates that breeders of genuine GSDs require before agreeing to breed from or with a registered GSD.

GSDs must have black on face & back. They can be self-black, or they can be black-&-tan (wolf sables are black & tan in colour - it is the way those pigments are distributed in each guard hair that makes them different to tan-points).

[Drops..]'s "Actually, the white ones are the MOST attractive", like the rest of her post, displays all the logic we expect from a person with a Diploma in Modelling. Unlike professional models, the GSD breed is NOT SUPPOSED TO BE "attractive" or "gorgeous" (let alone the "cute" favoured by BYB con-artists) - it is required to be FUNCTIONAL.
She cannot see the contradiction between her
·· "When you breed for one color combo only, you also miss out on so many wonderful genes-the gene pool gets narrowed down to near obliteration by breeding for a handful of frivolous aesthetic standards, perpetuating dangerous and fatal genetic diseases along the way by inbreeding"
and her
·· "Your white shepherd (having been ineligible for show) is actually probably MUCH healthier for it"
In the USofA, roughly 5% of what the AKC registers as "GSDs" are white. The gene pool for AKC-regd "GSDs" is in trouble anyway, so imagine how much trouble folk who use only the WHITE 5% of it are in!
One of the clubs for white GSDs courageously ran a survey among its members (the elite among breeders of self-white GSDs) and posted the results in the club's web-site. I'm told that it shows that 25% (that's 1 in every 4!) of their pooches has at least one problem other than colour. I possess a datatable from a study my country's GSD Council did for more than a decade prior to 1994. It shows that about 10% (that's 1 in 10) of our pooches has a problem other than colour.
Doesn't fit her idea that being unshown improves health! Not that whites are unshown in the USofA - the unrecognised UKC allows them shown as GSDs, and allows them shown as WGSDs.

·· "I selected the best breeder"
Oh REALLY? Genuine breeders (aka "the best breeders") do NOT cross-breed except in one of 2 specific situations - they know that it diminishes (or even loses) the best aspects of BOTH breeds.
The exceptions:
#1: As with Dalmatians, where EVERY individual had the allele for kidney stones. So a mating was done to a breed that lacked that gene, and those progeny back-crossed to pure Dalmatians and the F2s DNA-tested for whether they retained the "good" allele.
#2: As with the Dobermann breed, where Herr Dobermann used a variety of breeds, each of which possessed SOME of the points he wanted, and then selected just those pups that inherited most of those aspects, for future inter-breeding with pups that showed the other aspects, ending up with a new breed that breeds-true.

BTW, our adviser on Rough Collies back in the late 1960s was my nation's expert on blue merles. She knew to NOT mate merles together, and that using even ONE merle ran the risk of defects. "Merle" and "healthy" are difficult to get both of in one individual, unless you discount vision & hearing problems.

Her "Moral of the story, FORGET what an ignorant panel of judges deem attractive. It has no relevance to the quality or health, or really even attractiveness of the animal in question" is the nearest she gets to accurate.
Shows are the ruination of EVERY functional breed. Shows DO have a value, but not as run by the AKC, the CKC, The KC, the GSDCAmerica, the GSDCCanada.
The way it is run by the German SV (which last year attracted 1197 entries from around the world to its breed-show) is much more relevant. No pooch can enter its Adult class until it has gained either HGH (herding+courage) or SchH (tracking+obedience+courage) and passed a Körung (Breed Survey). There were 434 entries in 2009 (236m, 198f). All Adults have to pass the courage test at the start of the show - 112 of them were NOT allowed to compete in the main ring last year, because on Day 1 they lacked courage or were not safely under control .