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Sorry for being a bit late with the answers to the equine coat color quiz, I haven't been feeling my best.

The quiz can be found here.

I will just give a brief overview, and not go into too much detail. Please keep in mind, I'm no expert, equine color genetics is just a big interest of mine. As science keeps moving forward, I know there may be details here about certain genetics that are highly debatable.

So, let's start, shall we?

In the chart, you can see that the true answers are highlighted in green with a (T) after the name of the color, while the false answers are written in red with an (F) behind it.

Problem 1

(From left to right on chart.)
Offspring one: Chestnut/Sorrel - true. If the parents are heterozygous to black (Ee), they may produce a chestnut (ee).

Offspring two: Dark Bay (black + agouti) - true. While the black dam passes on the black base to it's offspring, the bay sire may pass on an agouti gene (A_), together with his black base color, making the offspring a bay.
Two black horses may produce a chestnut, if none of them are homozygous blacks (EE). An example of this is when Friesians (a breed well known for its black color) in rare cases have produced chestnut colored, purebred offspring.

Offspring three: Gray/Grey (any color(s) + the gray gene) - false. The offspring needs at least one of its parents to be gray, as the gray gene doesn't "hide" in a horse, but is dominant over other color genes. If a horse has the gene for graying (G), it visibly shows. A horse with the gray gene, can be born with any color, but grays out and becomes almost completely white (or a fleabitten gray) sooner or later. There are horses who keeps the color they are born with until they're around 3 - 5 years of age, before graying, but most commonly a gray horse has started graying out as a weanling (around 6 - 12 months old).
If any of the parents in this example were gray, but very late to gray out, then this gray offspring could be true.

Problem 2

(From left to right on chart.)
Offspring one: Silver Bay Sabino (black + agouti + silver + sabino) - true. I added this one as a bit of a trick question. Sorry.
You can tell this is a silver bay by the pale mane and tail with dark roots, and the darker, chocolate colored legs (a flaxen chestnut could be confused with a silver bay, but the chestnut's legs would be the same shade as the body). As the silver gene (Z) only affects black pigment, a red horse - in this case the chestnut sabino stallion - may carry the silver gene, but by looking at the horse, you can't tell it does. To confirm if a red based individual has the silver gene, it needs to leave a black based offspring that inherits the silver (by breeding the red horse to a black based non-silver). Another option would be DNA testing.
This offspring example also has a minimum form of sabino, that shows by the uneven edges of the leg markings, and the way the white on the jaw extends towards the chin.
If the chestnut sabino pictured here as a sire is a regular chestnut, then a silver offspring would of course be false.

Offspring two: Palomino (chestnut + 1 creme gene) - true. It's likely to get a palomino from this combination; the red base from the sire, and the creme gene from the dam. This palomino also has a chance of carrying the silver gene, if his sire carries it.

Offspring three: Grullo/Grulla/Black Dun/Blue Dun Sabino (black + dun + sabino) - true. A grullo sabino would be possible, but rare. It gets the black base and dun factor from the dam, and the sabino from the sire. This example could even be a Smoky Grullo Sabino (black + dun + 1 creme gene + sabino), as creme in a single dose mostly don't have much of an effect on black pigment, and so, could be overlooked. A DNA test for the creme gene would give a definite answer.

I truly hope you had fun with this. I'm very happy so many of you actually saw what colors I had in mind here, so I'm guessing my coloring skills can't be *too* crappy then.

If you want another coat color challenge, I have another one that's nearly ready for uploading.

Description
Sorry for being a bit late with the answers to the equine coat color quiz, I haven't been feeling my best.

The quiz can be found here.

I will just give a brief overview, and not go into too much detail. Please keep in mind, I'm no expert, equine color genetics is just a big interest of mine. As science keeps moving forward, I know there may be details here about certain genetics that are highly debatable.

So, let's start, shall we?

In the chart, you can see that the true answers are highlighted in green with a (T) after the name of the color, while the false answers are written in red with an (F) behind it.

Problem 1

(From left to right on chart.)
Offspring one: Chestnut/Sorrel - true. If the parents are heterozygous to black (Ee), they may produce a chestnut (ee).

Offspring two: Dark Bay (black + agouti) - true. While the black dam passes on the black base to it's offspring, the bay sire may pass on an agouti gene (A_), together with his black base color, making the offspring a bay.
Two black horses may produce a chestnut, if none of them are homozygous blacks (EE). An example of this is when Friesians (a breed well known for its black color) in rare cases have produced chestnut colored, purebred offspring.

Offspring three: Gray/Grey (any color(s) + the gray gene) - false. The offspring needs at least one of its parents to be gray, as the gray gene doesn't "hide" in a horse, but is dominant over other color genes. If a horse has the gene for graying (G), it visibly shows. A horse with the gray gene, can be born with any color, but grays out and becomes almost completely white (or a fleabitten gray) sooner or later. There are horses who keeps the color they are born with until they're around 3 - 5 years of age, before graying, but most commonly a gray horse has started graying out as a weanling (around 6 - 12 months old).
If any of the parents in this example were gray, but very late to gray out, then this gray offspring could be true.

Problem 2

(From left to right on chart.)
Offspring one: Silver Bay Sabino (black + agouti + silver + sabino) - true. I added this one as a bit of a trick question. Sorry.
You can tell this is a silver bay by the pale mane and tail with dark roots, and the darker, chocolate colored legs (a flaxen chestnut could be confused with a silver bay, but the chestnut's legs would be the same shade as the body). As the silver gene (Z) only affects black pigment, a red horse - in this case the chestnut sabino stallion - may carry the silver gene, but by looking at the horse, you can't tell it does. To confirm if a red based individual has the silver gene, it needs to leave a black based offspring that inherits the silver (by breeding the red horse to a black based non-silver). Another option would be DNA testing.
This offspring example also has a minimum form of sabino, that shows by the uneven edges of the leg markings, and the way the white on the jaw extends towards the chin.
If the chestnut sabino pictured here as a sire is a regular chestnut, then a silver offspring would of course be false.

Offspring two: Palomino (chestnut + 1 creme gene) - true. It's likely to get a palomino from this combination; the red base from the sire, and the creme gene from the dam. This palomino also has a chance of carrying the silver gene, if his sire carries it.

Offspring three: Grullo/Grulla/Black Dun/Blue Dun Sabino (black + dun + sabino) - true. A grullo sabino would be possible, but rare. It gets the black base and dun factor from the dam, and the sabino from the sire. This example could even be a Smoky Grullo Sabino (black + dun + 1 creme gene + sabino), as creme in a single dose mostly don't have much of an effect on black pigment, and so, could be overlooked. A DNA test for the creme gene would give a definite answer.

I truly hope you had fun with this. I'm very happy so many of you actually saw what colors I had in mind here, so I'm guessing my coloring skills can't be *too* crappy then.

If you want another coat color challenge, I have another one that's nearly ready for uploading.