Exam 25: Quantitative Genetics

Heritability values can be compared between populations if there is variation in the environmental conditions.

Quantitative traits usually have which of the following characteristics?

A trait that varies measurable in a species is called a discontinuous trait.

After several generations of artificial selective breeding, a plateau is reached where artificial selection is no longer effective. This is called the .

A population that is homozygous for a given allele is called polymorphic.

The variance is sum of the standard deviation from the mean divided by the degrees of freedom.

Traits that fall into discrete categories are called continuous traits.

The fact that quantitative traits may be based on a polygenic basis was first discovered in studies of DDT resistance in Drosophila.

QTL stands for quantitative trait loci and is an example of monogenic inheritance.

A regression analysis predicts how much one variable will change in response to a change in a second variable.

The sum of all of the values for a trait, divided by the total number of individuals, is called the standard deviation.

In QTL mapping, the parental strains are crossed and the F1 generation backcrossed to which of the following?

The square root of the variance is called the .