Exam 4

Question 1

genetic change in one or more traits resulting from selection for another trait

Answer 1

correlated respsonse

Question 2

selection for first one trait then another

Answer 2

tandem selection

Question 3

selection for one trait

Answer 3

single trait selection

Question 4

same gene(s) affecting more than one trait

Answer 4

pleiotropy

Question 5

selection for more than one trait

Answer 5

multiple trait selection

Question 6

breeding value of an individual for a combination of traits

Answer 6

aggregate breeding value

Question 7

a measure of the strength of the relationship between breeding values for two traits

Answer 7

genetic correlation

Question 8

a measure of the strength of the relationship between environmental effects on two traits

Answer 8

environmental correlation

Question 9

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

Answer 9

indirect selection

Question 10

a combination of weighting factors and genetic information on multiple traits

Answer 10

economic selection index

Question 11

minimum standards for traits under selection, with individuals failing to meet a single criterion not selected regardless of merit in other traits

Answer 11

independent culling levels

Question 12

genetic change in a trait resulting from selection for that trait

Answer 12

direct response

Question 13

a trait that may or may not be of importance itself but is selected for as a way of improving a genetically correlated trait

Answer 13

indicator trait

Question 14

change in aggregate breeding value doe to a one unit improvement in performance of a trait

Answer 14

economic weight

Question 15

a weighted combination of traits defining the aggregate breeding value

Answer 15

breeding objective

Question 16

a measure of the strength of the relationship between performance values for two traits

Answer 16

phenotypic correlation