Red Coat Is Dominant in Horses and White Coat Is

Multiple Choice

Red coat is dominant in horses and white coat is recessive. In a cross between a homozygous dominant red-coated horse and a white-coated horse, what genotype(s) would be observed in the offspring?​

A) ​all homozygous recessive
B) ​all homozygous dominant
C) ​half homozygous dominant and half homozygous recessive
D) ​all heterozygous
E) ​half heterozygous and half homozygous dominant