Horse Color Genetics
27 Points
Name: _____________________________
Define the following terms:
1. Heredity –
2. Genes –
3. Locus –
4. Allele –
5. Genotype –
6. Homozygous –
7. Heterozygous –
8. Phenotype –
9. Complete Dominance –
10. Partial or Incomplete Dominance –
11. Eumelanin –
12. Pheomelanin –
13. How many chromosomes does a horse have?
14. How many chromosomes does a donkey have?
15. How do we get a mule?
16. Using a Punnett Square.
If two roan shorthorns are bred, what are expected genotypes and phenotypes of their progeny?
Quantitative Coat Color – more than _______ loci involved
Gene W: White
Gene G: Grey
Gene E: Eumelanin (Black)
Gene A: Agouti (Black Points)
Gene C: Cream Dilution
Gene D: Dun
Gene Rn: Roan
Gene Ch: Champagne Dilution
Gene Z: Silver Dilution
Gene Prl: Pearl Dilution
Determine the color patterns of the following horses (21 Points, 3 points each):
1. ww gg ee aa CC dd rnrn NPrl
2. Ww Gg Ee aa CCcr dd rnrn NN
3. ww gg Ee Aa CC dd rnrn NN
4. ww gg Ee aa CC Dd rnrn NN
5. ww gg EE AA CC dd rnrn ZZ
6. ww gg ee aa CcrCcr dd rnrn NN
7. ww gg ee aa CC Dd RnRn NN