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

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

b.      How
many genes are involved?

c.     
Assign symbols for the alleles that determines these
phenotypes.

                   
d.      List the genotypes for each
phenotype.

A. ______________;     B.
______________;

           
C.

           
D. Palomino:

           
      Chestnut:

           
      Cremello: