Section 4: Concepts in Genetics
Vocabulary
T13: Fundamentals of Genetics

Allele

Chromosome

Dominance

Gene

Genotype

Germ Cell

Heterozygous

Homozygous

Lethal

Mutation

Qualitative Trait

Quantitative Trait
T14: Selection Strategies

Closebreeding

Crossbreeding

Inbreeding

Linebreeding

Outcrossing

Purebred Animal
T15: Coat Color Genetics

Gene A

Gene C

Gene D

Gene E

Gene G

Gene TO

Gene W
Questions
T13: Fundamentals of Genetics
1. What is the difference between a gene and an allele?
2. How many pairs of chromosomes does the horse have?
3. Distinguish between dominant, incompletely dominant, and recessive genes
4. What is the heritability of racing ability? Cutting ability? Jumping ability?
5. Which sex carries the genotype XX?
T14: Selection Strategies
6. Explain a linebreeding program.
7. List three different horse hybrids
T15: Coat Color Genetics
8. Explain how basic coat color is determined genetically
9. What coat color does the G gene control?
10. Which genes are considered dilution genes?
11. What genes would you want in a paint stallion to ensure that all his offspring would be
spotted?