Exam 1 Flashcards
Temperament in horse is relatively lowly heritable (h2=2.5-3.0%) and does not significantly affect the behavior of the horse.
True
The female tail line refers to the first three females on the bottom side (dam) of the pedigree.
True
Draft mares are commonly used for embryo transfer because of the genes they can pass to the foal
False
Using embryos transfer could increase the number of foals per mare each year which could increase genetic progress
True
Horses have a long generation interval relative to other species
True
A longer generation interval will decrease the rate at which you can make genetic progress
True
Genetic variation in a population typically follows a bell shaped distribution curve.
Tf
As far as making genetic progress, you want to select sires and dams that fall plus or minus 3 S.D. (Top 2.5%) from the mean
Tf
Relative to selection pressure, as you increase the number of traits selected for you decrease genetic progress.
Tf
Coat color is an example of a non-functional trait which has been used to make breeding decisions
False
If the heritability for reproductive traits is 10% then the environment accounts for 90% of the variation we see in this trait.
True
According to the data, the h2 for race time increases as you decrease the length of the race.
True
According to the data, the genetic correlations for race time between dirt and turf races are high and are increased as you increase the length of the race.
False
An example of an additive gene expression is when angle of the shoulder affects the stride length
True
The heritability of speed is much higher than for indexes such as cutting ability as measured by score, rank or earnings
True
