Answer:
75%
Explanation:
Heterozygous means that there is two different alleles, one being dominant, while the other is a recessive trait (Ww).
As stated in the question, it is noted that the dominant allele is denoted as a capital W, while a recessive allele is denoted as a lowercase w.
Two heterozygous unicorns are crossed. Create a Punnett Square. The probability for the offspring would be found within the Punnett Square.
[tex]\left[\begin{array}{ccc}&W&w\\W&WW&Ww\\w&Ww&ww\end{array}\right][/tex]
Remember, having the dominant trait (W) would result in the offspring obtaining a white horn. In this case, 3 of the 4 offspring has at least one dominant allele (W), or a 75% probability.
75% is the probability that the offspring will have a white horn.
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Learn more about the Punnett Square, here:
https://brainly.com/question/27984422