Two unicorns mate. One unicorn has a white horn and has genotype hhWw (has horns and the horn is white). The other unicorn has the genotype Hhww (it has genes for black horn, but no horn). What is the likelihood that they will have a colt with a white horn?

ok so for one you got 2 genes of color and two genes of horn/no horn

so that makes 1/4 chance of a white horn but then with the gene of the no horn it lowers down the chance to about 1/6 or 1/8 i think but yes other genes can counter act and lower or higher the chances of white horn