Horse: Principal horse coat colours and inheritance

Question 1

List the principle horse coat codes

Answer 1

1. A
2. C
3. E
4. G
5. D
6. W
7. R
   8.

Question 2

Horse Coat: A

Answer 2

Agouti

Distribution of black-coloured hair

Question 3

Horse Coat: E

Answer 3

Melanin

• Extension of red pigments
• Red
• Chestnut
• Sorrel (ee → Black skin with red hairs)

Question 4

Horse Coat: G

Answer 4

Exclusion of pigment from hair over time (Greying)

(Dominant)

Question 5

Horse Coat: D

Answer 5

Dilution

• Dominant
• Causes dun horse colour

Question 6

Horse Coat: W

Answer 6

White (Dominant)

• Unable to produce pigment
• (WW is embryonic: Lethal)

Question 7

Horse Coat: R

Answer 7

Roan

• Mixed dark and light
• Black
• Blue
• Bay
• Red roan

Question 8

Horse Coat: C

Answer 8

Colour

Question 9

Horse Coat: S

Answer 9

Spotting

Question 10

Horse Coat: P

Answer 10

Piebald

Question 11

Horse Coat: O

Answer 11

Overo

• Spotted

Question 12

Horse Coat: T

Answer 12

Tobiano

Question 13

Basic colours of horses are determined by…

Answer 13

W, G, E & A

Question 14

Give the basic horse colours

Answer 14

• Black
• Bay (brown)
• Chestnut
• White
• Variants: Grey/Roan

Question 15

Give the inheritance of horse colours

Answer 15

• Mendelian inheritance applies
• Roan: Intermediate/codominant inheritance

Question 16

Eel stripe is seen in…

Answer 16

Dun horses

Question 17

Cremello modifier

Answer 17

• Buckskin
• Cremello (shown)
• Palomino
• Perlino