Dominant vs Recessive

[corky]

I know feline genetics, not canine, so someone please help me out.

Is "with white" dominant?

Is longhair recessive?

What about colours? Is there a colour chart that predicts the colour of puppies in a litter?

Thanks!

 

[Zoom]

It depends on the breed. Like with Aussies, there is a short-haired gene but it's been so carefully selected AWAY from that you are pretty much never going to see a short-haired Aussie.

In some breeds, "with white" is dominant, some it's recessive, some it depends on the lines and the genetic makeup of the parents. I've seen dogs with minimal "flash" throw pups with a good amount of white to them.

You can fairly well predict the colors of the pups if you know exactly what the parents are carrying and what's behind them. I'll use Aussies since that's what I'm most familiar with. If one parents is say, homozygous for red and the other parents is carrying at least one red gene, odds are the pups are going to come out all red. But if you've got a set of parents that are heterozygous for both red and black (regardless of merle, though that will show up in some of the pups if one parents is merle) you'll have a mix of colors and markings.

 

[Laurelin]

I've seen color charts for separate breeds but not for dogs as a whole. Too many different variables.

White is complicated. I just recently had a thread on this but solid is incompletely dominant and there are three versions of white spotting in dogs. Irish spotted, piebald and extreme piebald. there are also modifiers that can be present so it is extremely complicated on how white is inherited and in what amounts.

Also general rule of thumb merle is always dominant and dilute is recessive. Some colors in some breeds are connected to health problems (dilute, high white, etc) but in other breeds are inherited different ways and might not be a problem) For example both american hairless terriers and chinese cresteds are hairless but it is two completelt different ways of inheriting hairlessness. (I think is AHT it's recessive and Cresties it's dominant? maybe vice versa) So yes... complicated stuff.

I'm not sure about hair. I'd assume long is recessive but there's so many different hair lengths and types it's probably pretty complicated.

I like referencing this page:

Papillon Information Site

It's for papillons but they include other genes not present in paps too.

There's also a sheltie page I like... maybe I can dig it up.

 

[corky]

It depends on the breed.

Interesting. In cats, colours and coat-length are not breed-specific.

Like with Aussies, there is a short-haired gene but it's been so carefully selected AWAY from that you are pretty much never going to see a short-haired Aussie.

I assume that short-hair is dominant, then, which makes it easy to eliminate from a breed. (In cats short hair is also dominant, so short hair breeds sometimes have long-haired offspring because the recessive gene can be carried by both parents and then pop-up unexpectedly.)

 

[Laurelin]

Here is the sheltie site: Coat Color Genetics

 

[corky]

...both american hairless terriers and chinese cresteds are hairless but it is two completelt different ways of inheriting hairlessness.

Yes, I get this. My cat breed has rexed (curly) coat, but the gene that makes my cats curly is different from the gene in another breed. Breed A x Breed B = a normal-coated cat.

I just love the genetics!

 

[corky]

Thanks for the links and info!

 

[Dekka]

with dogs there are various 'types' of long hair. Likely one of the reasons there are different genetic combinations that make up the long haired coat.

 

[crazy_paws]

For example both american hairless terriers and chinese cresteds are hairless but it is two completelt different ways of inheriting hairlessness. (I think is AHT it's recessive and Cresties it's dominant? maybe vice versa) So yes... complicated stuff.

Yes, hairlessness is dominant in chinese cresteds. But it can't be homozygous. Any homozygous hairless crestie zygote will be resorbed. It's why the powderpuffs are so important to the breed. They are homozygous recessive.

It's also an interesting gene in it's expression. Hairless chinese cresteds can vary from an almost full single coat to practically complete hairlessness. The cresties in the ring with the full furnishings are groomed, at least to some extent, to look that way.