Exam #3 ANSC 4395
Study online at https://quizlet.com/_alv05x
1. Simply-Inherited a trait affected by only a few genes
Traits Qualitative
EX: Coat, Color, Horns
2. Polygentic Traits Affected by many genes with no gene having an overriding influence
Quantitative
EX: Growth rate, milk production, ribeye area
3. Polygenic Traits are the environment:
influenced by 1) lack of feed
2) heat/cold stress
3) training of quarter horses (speed)
4. Simply-Inherited -both types of traits are subject to the same Mendelian mechanisms (Laws of
and Polygenic traits Segregation and Independent Assortment)
are -Dominance and epistasis affect both
-Principles of selection and mating apply to both
5. Function of the -the more genes involved, the more difficult it is to observe the effects of
number of genes in- individual genes, and therefore the less specific info we have about those
volved genes
-more "noise" in the equation
-when a few or one gene affects a trait, the effects of those genes are well
understood
6. Test Matings mating designed to reveal the genotype of an individual for a small number
of loci
(Simply-Inherited Traits)
7. There are 3 gener-
al types of test mat-
1/7
, Exam #3 ANSC 4395
Study online at https://quizlet.com/_alv05x
ings to determine if 1) mating to recessives
an individual is het- 2) mating to heterozygotes
erozygous: 3) mating a sire to his daughter
8. The method with the mating to recessives
highest probability - probability of siring a recessive offspring is 1/2
of detection is
9. If the condition is -Use known heterozygotes
deleterious, it may -Probability of a recessive offspring is 1/4 of the probability of the offspring
be hard to find showing the dominant phenotype is 3/4
homozygous reces-
sives
10. Most economically quantitative
important traits in -measured on a numerical scale
livestock are
11. Phenotypes will Normal Distribution
closely approximate
a statistical distribu- -also called the Bell Curve
tion known as the
12. Statistic estimate of a parameter
13. Parameter avalue that describes a population
14. Population all the members of a group
15. Sample a subset of the population
16. Variables whatever trait is measured on a group of individuals
-different individuals will have different values of measurement for that trait
2/7
Study online at https://quizlet.com/_alv05x
1. Simply-Inherited a trait affected by only a few genes
Traits Qualitative
EX: Coat, Color, Horns
2. Polygentic Traits Affected by many genes with no gene having an overriding influence
Quantitative
EX: Growth rate, milk production, ribeye area
3. Polygenic Traits are the environment:
influenced by 1) lack of feed
2) heat/cold stress
3) training of quarter horses (speed)
4. Simply-Inherited -both types of traits are subject to the same Mendelian mechanisms (Laws of
and Polygenic traits Segregation and Independent Assortment)
are -Dominance and epistasis affect both
-Principles of selection and mating apply to both
5. Function of the -the more genes involved, the more difficult it is to observe the effects of
number of genes in- individual genes, and therefore the less specific info we have about those
volved genes
-more "noise" in the equation
-when a few or one gene affects a trait, the effects of those genes are well
understood
6. Test Matings mating designed to reveal the genotype of an individual for a small number
of loci
(Simply-Inherited Traits)
7. There are 3 gener-
al types of test mat-
1/7
, Exam #3 ANSC 4395
Study online at https://quizlet.com/_alv05x
ings to determine if 1) mating to recessives
an individual is het- 2) mating to heterozygotes
erozygous: 3) mating a sire to his daughter
8. The method with the mating to recessives
highest probability - probability of siring a recessive offspring is 1/2
of detection is
9. If the condition is -Use known heterozygotes
deleterious, it may -Probability of a recessive offspring is 1/4 of the probability of the offspring
be hard to find showing the dominant phenotype is 3/4
homozygous reces-
sives
10. Most economically quantitative
important traits in -measured on a numerical scale
livestock are
11. Phenotypes will Normal Distribution
closely approximate
a statistical distribu- -also called the Bell Curve
tion known as the
12. Statistic estimate of a parameter
13. Parameter avalue that describes a population
14. Population all the members of a group
15. Sample a subset of the population
16. Variables whatever trait is measured on a group of individuals
-different individuals will have different values of measurement for that trait
2/7
