A cow with red coat is crossed with a bull having white coat. Their offspring produced in 
generation showed roan coat. This effect is produced due to juxta position of small patches of red and white colour. What can be assumed about the gene controlling coat colour in cattle?
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Let us suppose RR as cow with red coat and WW as bull having white coat. Then the cross between them will produce RW offsprings with roan coat in 
generation. Roan means that their coat is red with a liberal sprinkling of white hairs. In cattle, the alleles producing coat color are co-dominant. Co-dominance is the phenomenon in which both the alleles of a contrasting character are expressed in heterozygous condition.
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