A)is one of the genes that influences a trait.
B)is a chromosomal region containing genes that influence a quantitative trait.
C)will not contain any genes other than the ones influencing a trait.
D)is a measure of the phenotypic variation in a quantitative trait.
E)is a measure of the genetic variation in a quantitative trait.

A)Most of the variation in milk production in the herd is due to additive genetic variance within the herd.
B)Most of the variation in milk production in the herd is due to dominant genetic variance.
C)Little of the variation in milk production is due to environmental variation within the herd.
D)Selective breeding for high milk production in this herd will be effective.
E)Broad-sense heritability for milk production will be high in most other herds of dairy cattle.

A)Mean
B)Standard deviation
C)Variance
D)Correlation coefficient
E)Narrow-sense heritability