Palomino horses have a golden yellow coat, chestnut horses have
a brown coat, and cremello horses have a coat that is almost white.
A series of crosses between the three different types of horses
produced the following offspring:   

Palomino x Palomino        13
Palomino, 6 Chestnut, 5 Cremello
Chestnut x
Chestnut                      
16 Chestnut
Cremello x
Cremello          13
Cremello
Palomino x Chestnut        
10 Palomino, 12 Chestnut
Palomino x Cremello        
8 Palomino, 9 Cremello
Chestnut x
Cremello          26
Palomino

What is the mode of inheritance of Palomino, Chestnut, and
Cremello?

How many genes are involved?

Assign symbols for the alleles that determines these
phenotypes.

List the genotypes for each phenotype.