Ch. 5

Question 1

Simply-inherited traits*

Answer 1

A trait affected by only a few genes

Question 2

Qualitative or categorical traits *

Answer 2

A trait in which phenotypes are expressed in categories

Question 3

Quantitative trait*

Answer 3

A trait in which phenotypes show continuous (numerical) expression

Question 4

Polygenic traits *

Answer 4

a trait by many genes, no single gene having an overriding influence

Question 5

Dystocia*

Answer 5

Difficulty in giving birth

Question 6

Threshold traits*

Answer 6

A polygenic trait in which phenotypes are expressed in categories

Question 7

test matings*

Answer 7

a mating designed to reveal the genotype of an individual for a small # of loci

Question 8

Simply Inherited traits characteristics

Answer 8

Qualitative and affected very little by the environment

Question 9

Polygenic traits characteristics

Answer 9

quantitative and affected by the environment.

also tend to be more important than SI

Question 10

Common characteristics

Answer 10

Mendelian Laws apply to both; Basic tools of animal breeding are the same; Mating system Hardy-Weinburg Equilibrium the same

Question 11

Different Approaches to breeding

Answer 11

SI: Testing mating
Polygenic: too many genes to examine single loci