CH. 13

Question 1

Correlated Response to Selection

Answer 1

Genetic change in one or more traits resulting from selection for another

Question 2

Pleiotropy

Answer 2

The phenomenon of a single gene affecting more than one trait

Question 3

Genetic Correlation

Answer 3

(1) A measure of the strength (consistency, reliability) of the relationship between breeding values for one trait and breeding values for another trait; (2) A measure of pleiotropy

Question 4

Phenotypic Correlation

Answer 4

A measure o the strength (consistency, reliability) of the relationship between performance in one trait and performance in another trait

Question 5

Environmental Correlation

Answer 5

A measure of the strength (consistency, reliability) of the relationship between environmental effects on one trait and environmental effects on another trait.

Question 6

Compensatory Grain

Answer 6

A relative increase in the growth rate of thin animals after they are placed on adequate feed. They tend to compensate for being underweight.

Question 7

Direct Response to Selection

Answer 7

Genetic change in a trait resulting from selection for that triat

Question 8

Indirect Selection

Answer 8

Selection for one trait as a means of improving a genetically correlated trait

Question 9

Direct Selection

Answer 9

Selection for a trait as a means of improving that same trait

Question 10

indicator trait

Answer 10

A trait that may or may not be important in itself, but it selected for as a way of improving some other genetically correlated trait.