Stutts - ANSC 4395 Breeding & Genetics Test 3 exam Question & Answers 2026.docx

Stutts - ANSC 4395 Breeding &
Genetics - Test 3 exam Question &
Answers 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

, Stutts - ANSC 4395 Breeding &
Genetics - Test 3 exam Question &
Answers 2026

Threshold Traits - CORRECT ANSWERS ✔✔Polygenic
traits that have categorical phenotypes
- 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