Horse Genetics and Coat Color

The video tutorial explores the genetics of horse coat color, focusing on various genes and their interactions. It covers the white gene, which can cause lethal white syndrome, and the gray gene, which leads to color change over time. The extension and agouti genes determine black and chestnut coats. Other genes like the cream and dun genes are briefly discussed. The tutorial also includes a Punnett square to illustrate genetic outcomes and concludes with a summary of genetic interactions and visual aids.

How many loci are primarily involved in determining horse coat color?

• 28

• 21

• 14

• 7

What happens to a horse embryo with the genotype WW for the white gene?

• It is born gray

• It is born white

• It is born chestnut

• It dies in utero

What is the phenotype of a horse with the genotype Ww for the white gene?

• White

• Gray

• Chestnut

• Black

What is the effect of having at least one G allele in a horse's genotype?

• The horse is born black

• The horse is born white

• The horse turns gray over time

• The horse is born gray

Which genotype results in a horse that does not turn gray?

• GG

• Gg

• gg

• Gg or GG

What is the coat color of a horse with the genotype Ee and aa?

• White

• Gray

• Chestnut

• Black

What is the result of the interaction between the E and A genes when the genotype is EE and Aa?

• Chestnut

• Bay

• Solid black

• Gray

What is the phenotype of a horse with the genotype ee and aa?

• Black

• Bay

• Chestnut

• Gray

What is the role of the cream gene when the genotype is CC?

• Results in a chestnut color

• Makes the horse white

• Turns the horse gray

• No influence on color

What does a Punnett square help predict in horse genetics?

• The horse's speed

• The horse's age

• The horse's height

• The horse's coat color