Stutts - ANSC 4395 Breeding & Genetics
- Test 3 Answered Questions (Latest
2026)
Simply-Inherited Traits - Correct Answers ✅traits affected
by only a few genes
qualitative or categorical
affected little by environment
Quantitative - Correct Answers ✅measured with numbers
Polygenic Traits - Correct Answers ✅Affected by many
genes with no gene having an overriding influence.
- EX: Growth rate, milk production, ribeye area
Typically quantitative or continuous in expression.
- Phenotypes are usually described by numbers
Greatly influenced by environment
Examples of Simply-Inherited Traits - Correct Answers
✅Coat color, horns
Examples of Polygenic Traits - Correct Answers ✅Weaning
weights, milk yield, REA... CANT DO TEST MATINGS FOR THIS
TYPE OF TRAIT
Threshold Traits - Correct Answers ✅Polygenic traits that
have categorical phenotypes
, Stutts - ANSC 4395 Breeding & Genetics
- Test 3 Answered Questions (Latest
2026)
- Pregnancy, dystocia, gait
- Influenced by many genes but have an either/or result
Which traits are more important? - Correct Answers
✅Polygenic traits, traits that determine profitability and
productivity
EX) Growth rate, fertility, milk production
Niche markets - Correct Answers ✅markets more sensitive
to simply-inherited traits
Simply Inherited - Correct Answers ✅Genetic Defects
Common characteristics of Polygenic and Simply Inherited -
Correct Answers ✅1. Both are subject to the same
Mendelian Mechanisms: Law of Segregation and Independent
Assortment
2. Affected by dominance and epistasis
3. Principles of selection and mating apply to both
- Attempt to increase frequency of desirable alleles
(More difficult to do with polygenic traits)
Function of the Number of genes involved - Correct
Answers ✅- The more genes involved, the more DIFFICULT it
- Test 3 Answered Questions (Latest
2026)
Simply-Inherited Traits - Correct Answers ✅traits affected
by only a few genes
qualitative or categorical
affected little by environment
Quantitative - Correct Answers ✅measured with numbers
Polygenic Traits - Correct Answers ✅Affected by many
genes with no gene having an overriding influence.
- EX: Growth rate, milk production, ribeye area
Typically quantitative or continuous in expression.
- Phenotypes are usually described by numbers
Greatly influenced by environment
Examples of Simply-Inherited Traits - Correct Answers
✅Coat color, horns
Examples of Polygenic Traits - Correct Answers ✅Weaning
weights, milk yield, REA... CANT DO TEST MATINGS FOR THIS
TYPE OF TRAIT
Threshold Traits - Correct Answers ✅Polygenic traits that
have categorical phenotypes
, Stutts - ANSC 4395 Breeding & Genetics
- Test 3 Answered Questions (Latest
2026)
- Pregnancy, dystocia, gait
- Influenced by many genes but have an either/or result
Which traits are more important? - Correct Answers
✅Polygenic traits, traits that determine profitability and
productivity
EX) Growth rate, fertility, milk production
Niche markets - Correct Answers ✅markets more sensitive
to simply-inherited traits
Simply Inherited - Correct Answers ✅Genetic Defects
Common characteristics of Polygenic and Simply Inherited -
Correct Answers ✅1. Both are subject to the same
Mendelian Mechanisms: Law of Segregation and Independent
Assortment
2. Affected by dominance and epistasis
3. Principles of selection and mating apply to both
- Attempt to increase frequency of desirable alleles
(More difficult to do with polygenic traits)
Function of the Number of genes involved - Correct
Answers ✅- The more genes involved, the more DIFFICULT it
