Answer:
1:2:1
Explanation:
To get the phenotypic ratios, first you must figure out the genotype results of the cross. If the two cattle both have RW, then you get 25% RR, 50% RW, and 25% WW.
This means you have 1 fully red cattle, 2 roan cattle, and 1 fully white cattle, or just simplified as 1 (red) : 2 (roan) : 1 white.