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Quiz about Horse Coat Colors and Genetics

Horse Coat Colors and Genetics Quiz

This is a quiz about Horse Coat Colors and Horse Color Genetics. Questions are based on material from 'The Horse, 2nd Edition" by Evans, Borton, et al, the Horse Industry Handbook, and certain other sources on genetics.

A multiple-choice quiz by kspirit. Estimated time: 5 mins.

Author
kspirit

Time
5 mins

Type
Multiple Choice

Quiz #
160,034

Updated
Jun 26 23

# Qns
10

Difficulty
Difficult

Avg Score
4 / 10

Plays
3523

Last 3 plays: Guest 107 (6/10), Guest 146 (3/10), Guest 98 (6/10).

One at a Time - Single Page - Timed Game

Question 1 of 10

1. On a perlino horse, what color are the points? Hint

rust

cream

white

black

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Question 2 of 10

2. What is the term for the genetic makeup of a horse? Hint

phenotype

genotype

chromosomes

blood

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Question 3 of 10

3. Which locus controls the gene for roan coloring? Hint

T locus

G locus

E locus

R locus

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Question 4 of 10

4. How many pairs of chromosomes do horses have? Hint

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Question 5 of 10

5. If a horse has the genotype AAEE, AaEe, or AAEe, what color is it? Hint

Grey

Chestnut

Black

Bay

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Question 6 of 10

6. If a horse has the genotype RnRn, it is: Hint

Homozygous

The foal of two roan parents

Probably dead

All of these

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Question 7 of 10

7. If a horse has the genotype Zz, it is what color? Hint

Silver Dapple

Splash White

Tobiano

Flaxen mane and tail

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Question 8 of 10

8. Roan, Dominant White, and Grey are called what: Hint

dilution genes

lethal genes

epistatic modifiers

pinto patterns

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Question 9 of 10

9. Lethal white syndrome causes a foal to be born without a functional ___? Hint

colon

liver

heart

tail

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Question 10 of 10

10. A double dilution of the creme gene can result in what two colors? Hint

palomino and buckskin

cremello and champagne

dun and perlino

cremello and perlino

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Most Recent Scores

Dec 16 2024 : Guest 107: 6/10
Dec 13 2024 : Guest 146: 3/10
Nov 19 2024 : Guest 98: 6/10
Nov 05 2024 : Guest 148: 4/10
Nov 05 2024 : Guest 94: 7/10

Score Distribution

Quiz Answer Key and Fun Facts

1. On a perlino horse, what color are the points?

Answer: rust

Perlinos have rust colored points. The black is diluted to a rust color instead of a cream color.

2. What is the term for the genetic makeup of a horse?

Answer: genotype

The genotype is the genetic makeup (which genes a horse has, and in which forms) and controls the phenotype.

3. Which locus controls the gene for roan coloring?

Answer: R locus

The gene for roan is located on the R locus. T is tobiano spotting, E is for base coat color, and G is grey.

4. How many pairs of chromosomes do horses have?

Answer: 32

That makes 64 in total!

5. If a horse has the genotype AAEE, AaEe, or AAEe, what color is it?

Answer: Bay

The E's cause the horse to have a black base, while the A's restrict the black hair to the points.

6. If a horse has the genotype RnRn, it is:

Answer: All of these

A horse that is RnRn is homozygous for the roan gene, and it will probably die in utero since roan is frequently lethal in its homozygous dominant form. It also had to come from two roan parents, which would be a very risky pairing that most breeders probably would never attempt.

7. If a horse has the genotype Zz, it is what color?

Answer: Silver Dapple

The genes on the Z locus determine whether or not a horse is silver dapple. This gene is rare in most breeds, but very common in Shetlands, Minis, and Icelandic ponies.

8. Roan, Dominant White, and Grey are called what:

Answer: epistatic modifiers

They totally or partially mask the presence of other coat colors.

9. Lethal white syndrome causes a foal to be born without a functional ___?

Answer: colon

The foal will often be carried to full term and appear normal, although mainly white and with blue eyes. The foal cannot survive and will be euthanized as soon as the condition is identified. Both parents need to be carriers of the mutated gene for the foal to inherit the fault, and DNA testing can prevent this happening.

10. A double dilution of the creme gene can result in what two colors?

Answer: cremello and perlino

These two colors are both recognized by the American White Horse association.

Source: Author kspirit

This quiz was reviewed by FunTrivia editor crisw before going online.
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