Predicting foal colour?

No, color can't skip in that fashion. Genetics are incredibly complicated so I hope that I explain this in a way that makes sense.

Since your mare hasn't been tested for carrying color, we don't know whether she is heterogeneous or homogeneous. In its very basics, heterogeneous means that she doesn't carry color, and homogeneous means that she does. Her sire was homogeneous -- he had two dominant genes which expressed his color.

Given that she was born without color, we can assume her dam was heterogeneous -- she had one or two recessive genes. One recessive and one dominant means that she carried color from somewhere else in her lineage but isn't showing it, two recessives means that she never had color at all. This means if she had one dominant, the result would have been 50/50 for her to have been born colored. If she had two recessives, she will never be able to produce color. Whether or not your mare carries a colored gene from dam or sire, we don't know.

Now, your foal's sire. If there is no color on his side, we can assume he is heterogeneous for colored genes, doubly recessive. Chances are good that he'll never have colored foals, even if he was paired with a homogeneous mare.

So, you're looking at two heterogeneous parents. Let's assume your mare is heterogeneous for one dominant and one recessive, and so is the sire. This gives the foal 50/50 chance of having color. If the mare is heterogeneous for double recessives, and so is the sire, there is zero percent for a foal. And, the percentages are anywhere in between for different numbers of dominant or recessive alleles.

NOW. What will the foal's base color be since we can deduct he won't be colored.

A piebald cob is black based.

A bay horse is also black based, but has a gene called agouti which "erases" the black on the body, leaving black points.

A dark bay horse is a regular ol' bay, but they have a lot of what's called sooty (also referred to as counter shading or mealy). Sooty puts the black hairs back in, where agouti took them out, but any horse can have sooty.

The sire's chance of producing a chestnut foal depends on the dam. His chance of producing a chestnut foal with your mare are incredibly slim.

Your mare's foal will be bay or dark bay, for the sheer fact both parents are bays. Black and chestnut are considered base colors, every single other color is born out of these two. You would have to erase genes from the sire and dam to get back to one of these, by breeding recessive genes, so that they "disappear". Because both parents show agouti, they are homogeneous, therefore their offspring will be as well.

My bet is that he'll have a lovely, deep red color with rich points and a good chance for heavy sooting. Sooty on a bay can look absolutely gorgeous if it patterns just right, it can even give them dapples.

Horse coat color genetics are only a little bit complicated.

Unless you know the colors of both the sires parents, it will be hard to predict. I can guarantee that one was a chestnut.

Chestnut is dominant over bay, but double bay is dominant. Prolly a bay but there is no way to do the chart without knowing the sire's parents color.

Your foal will most likely be a bay but simplistically, since both parents are bay it is also possible to have a chestnut - 25%.

A 'authentic' black is tremendous/ok or ok/ok. except you have his genetic information and comprehend that he's tremendous/ok or ok/ok, you do not comprehend that he's a 'authentic' black. If he would not carry ok he's not black. He could desire to probably be an extremely dark coloration of bay, sorrel, chestnut or seal brown. it somewhat is complicated to foretell what the foals would be devoid of their genetic information and the genetic information of their mothers and dads. i.e. it somewhat is possible to your first mare to be carrying Sabino 2 devoid of exhibiting the sabino trend. that could advise the foal could desire to be sabino. If she's a chestnut all of us comprehend she's e/e, yet is your stallion E/e or E/E? We additionally do not comprehend eithers Agouti factor. Which determines no rely if the black is proscribed to a horses factors (as shown in bays). As to your 'tri-colored bay' mare all of us comprehend she has a pinto trend, yet what trend? Sabino, Tobiano, Tovero, Overo, splash?

Bay, if your lucky a bay with some white chrome.

Get hold of Prof. Steve Jones' book "The Language of the Genes." He is the expert in genetic inheritance and will show you how it works.

Here try this :)

http://www.horsetesting.com/CCalculator1.asp

Although this is your answer

http://www.horsetesting.com/CCalculator3.asp

You only have 3 color chances, Bay, Chestnut, and very slim chance of black