Colors/Markings
Describe the coat of a medicine hat horse.
A pinto horse that has a mostly white body with dark hairs covering the pole and ears, similar to a bonnet. They are also called war bonnets.
What is the genetics of horse coat called?
Polygenetic; at least 18 genes code this
What are 3 vitamin A toxicity symptoms?
1.) Slowed growth; 2.) Dull coat; 3.) Poor muscle tone; 4.) ataxia (incoordination); 5.) Bone deformities; 6.) Death.
What is a horse with EMS at risk for/already have?
A horse with Equine Metabolic Syndrome is prone to or already has obesity, insulin-resistance, and is prone to laminitis.
What 2 things can cause weaving?
Genetics and environment issues.
Can two black horses produce a chestnut?
Yes, the black horse gene is Ee. There is a 25% chance of this happening.
What genetic disorder is characterized by hyperextensible skin and severe lesions?
Hereditary equine regional dermal asthenia (HERDA)
What is the purpose of riboflavin?
It produces energy.
What is the common name for pituitary pars intermedia dysfunction?
Cushing's disease.
What is maternal aggression and when does it occur?
A mare that is aggressive in the first few days after birth.
On a perlino horse, what color are the points?
Rust or copper colored.
What gene variation is linked to racing performance in thoroughbreds?
Variation is the MSTN or myostatin gene, this gene controls muscle growth and prevents excess muscle mass.
What percentage of body weight must be roughage?
1%
What is Lethal White Syndrome and what colors is it most common in?
A fatal condition in newborn foals where the intestines cannot move waste, due to a non-functional and undeveloped colon. Some foals may be born deaf. Most common in Overo horses.
What is nymphomania?
Exessive sexual behavior in mares usually due to changes in the ovary.
What two faces will you see most often in sabino horses?
Apron and bonnet.
What is the term for the procedure to visualize, examine, and count chromosomes under a microscope?
Karyotyping
What can a sudden change in diet result in?
Colic.
What is eccentrocytosis and what system of the horse does it affect?
Ecentrocytosis in horses is a condition characterized by the presence of eccentrocytes, a type of abnormal red blood cell. It affects the circulatory system.
What is extinction?
A response that stops when the reward is removed.
What are the two types of melanin that almost all coat colors are derived from?
Eumelanin (Black/Brown) and Phaeomelanin (red/yellow)
What performance trait is associated with the DMRT3 gene?
Gaitedness is horses.
What is the most absorbent organ in the horse?
Small intestine.
What is methemoglobinemia and how does it present in horses?
It is when the hemoglobin (normal red blood cells) oxidizes to the Fe3+ form which cannot carry oxygen, it causes lethargy, cyanosis (blueish-purple tint to the skin), and respiratory distress.
What is cowhopping?
Bucking.