In Ayrshire cattle, the coat can be either red and white or mahogany and white. The mahogany and white phenotype is caused by the allele SM. The red and white phenotype is controlled by the allele SR. The following table shows the relationship between genotype and phenotype for males and females:

Phenotype Genotype Females Males SMSM Mahogany and white Mahogany and white SMSR Red and white Mahogany and white SRSR Red and white Red and white Explain the pattern of inheritance.