Chunk 1: A horse with red hair mates with a horse with white hair, and their offspring has both red and white hair: How can this be? If characteristics are controlled by single genes with simple dominant and recessive alleles, the colt's hair should be one color or the other. Not always! Most of the time, characteristics, such as hair color in horses, display more-complex patterns of heredity than the simple dominant and recessive discussed so far. the teacher told me what do I understand from this