Resulting pups from this breeding of gads? Questions

Hi, I got asked this question a few days ago(from a not very dogieish friend and its been bugging me, the general genetic side) and wasnt 100% sure of the answer so would be grateful if someone could tell me...What would be the coat length/colour of puppies produced from a black and tan standard length coat bitch(parents of which, mum is long coat and dad is standard coat) she also has one white gparent 3generations back. To a white long coat male (parents of which one is black and tan long coat and dad is long blackk and tan) with short white hair further back in his lines.
This is in NO WAY a planned mating!!!! just a query lol- if I havnt explained it very well just let me know thanks

Wouldn`t you get a mixture? (of pups that is)

Ballynabola breed long haired GSD, with varying colours, maybe have a look at theirs and you'll get an idea...

Ive had a look but cant find anything

As far as I know white is a recessive gene, so it depends whether the coloured one carries that gene?

the only introduction of white into her lines was three generations back- and that was a male

Then I would think that the pups would be coloured. Don't know about coat length though.

I'm not 100% on this either, just had to write down on peice of paper in my own understanding...if dad is long coat and both his parents are long coats, then technically there should be a mix of long and short coats in the mix as the mum SHOULD be carrying the LC gene. As for colour...thats a tough one...i would guess majority black and gold, i'd take a guess at maybe one or two whites maybe, although as there are few whites in the background i'd likely go with black and gold in the litter.

But then dad is from to black and golds, so they were carrying the white gene..i guess it depends if the bitch is carrying the recessive white gene. I'm not up on my recessive white genes etc yet so i'd go with black and gold and perhaps...white if very lucky! lol if they are looking to produce whites, which is what i'm guessing from using a white dog?

lol thanks for that lupus- thats how I thought it was too!!
It was a question from a friend of mine about my two dogs-not a planned mating or anything of the sort- I just wanted to make sure I had given her the right answer lol

Maternal genotype specified: asas IntInt Whwh
Maternal phenotype: Black and Pale Red Saddled carrying white
Paternal genotype specified: at- whwh
Paternal phenotype: White carrying tan point

4 potential genotypes:
25.00% asat Intintm whwh Hd=17 Edyno Plxno - White carrying saddled + tan point + pale
25.00% as- Intintm Whwh Hd=17 Edyno Plxno - carries saddled + pale + white
25.00% as- Intintm whwh Hd=17 Edyno Plxno - White carrying saddled + pale
25.00% asat Intintm Whwh Hd=17 Edyno Plxno - Black and Pale Red Saddled carrying tan point + white

3 potential phenotypes:
50.00% White
25.00% Unknown
25.00% Black and Pale Red Saddled

4 potential phenotypes with carried traits:
25.00% White carrying saddled + tan point + pale
25.00% carries saddled + pale + white
25.00% White carrying saddled + pale
25.00% Black and Pale Red Saddled carrying tan point + white

4 potential carried traits:
25.00% saddled + tan point + pale
25.00% saddled + pale + white
25.00% saddled + pale
25.00% tan point + white

Long-haired coat length is inherited as an autosomal recessive trait. Therefore, dogs that are carriers of the long-hair mutation will appear to be normal (short hair) themselves, but will likely pass on the long-hair mutation 50% of the time

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Yes, basically what Lupus has said is correct... it will depend on whether the dam carries white which is recessive on the E locus, a white phenotype needing the double ee to express. Her parent that is an offspring of a white will definitely be a white carrier and this gives a 50:50 chance of the dam herself inheriting this, so -

If the dam does carry white, each puppy born will have a 50:50 chance of being white. If the dam does not carry white, no whites will be born.

As for the colour of the rest of the puppies, well really any of the known GSD colours are possible (except sable) including black & tan, solid black, blue, liver, fawn. Some of those are uncommon in the breed and very unlikely to appear, the most likely of course being black & tan.

As for the coat length, inherited as a recessive, the dam is a carrier (from her dam), so this gives each puppy born a50:50 chance of long or normal coat.

So is genetics different in dogs to other animals and humans then?

i thought the white hair gene was recesive and a pup would have to have the recessive gene from BOTH parents to produce a white coat. Otherwise, one recessive gene from one parent would always be competing with a dominant gene for a diffeent colour from the other parent and the white wouldn't show.

or have I got my doggy biology back to front?

Laura xx

well wouldnt the bitch carry the recessive white gene from way back the one time it was introduced...thats how i understand it..

No, you have got it right. Which post do you think contradicts this?