Final answer:
When red and white cattle are mated, the only color that is produced is roan, which is the result of incomplete dominance.
Step-by-step explanation:
When red and white cattle are mated, the only color that is produced is roan. This is because the pattern of genetic expression in this case is called incomplete dominance. Incomplete dominance occurs when neither of the alleles is completely dominant over the other, so the phenotype of the offspring is a blend of the two parent colors.
In the case of red and white cattle, the red allele and the white allele are both expressed, resulting in the roan color where red and white hairs grow alongside each other.