What color foal will be out of a sorrel paint mare bred to grey stud?

It's impossible to predict the exact color of the foal with certainty, but we can narrow down the possibilities. Here's why:

* Sorrel Paint: This mare carries the "paint" gene, which creates the patchy color pattern. She also carries the "sorrel" gene, which means she has red-toned coat with a flaxen mane and tail.

* Grey Stud: The stud carries the "grey" gene, which is dominant. This means any foal inheriting the grey gene will be grey, regardless of the other parent's color genes.

Possible Foal Colors:

* Grey: If the foal inherits the grey gene from the stud, it will be grey. The paint pattern might be visible, leading to a grey paint foal.

* Sorrel Paint: It's possible for the foal to inherit the paint gene but not the grey gene. In this case, the foal would be a sorrel paint, with the same red-toned coat and flaxen mane/tail as its mother.

Important Note: The exact expression of the paint pattern is unpredictable. The foal could have a very similar pattern to its mother or a completely different one.

In summary, the foal could be either grey paint or sorrel paint. The chances of either color depend on which genes the foal inherits from its parents.