Final answer:
The statement 'In unicorns, white fur is dominant (F) and black fur is recessive (f). Unicorn fur is inherited by incomplete dominance, showing an intermediate (heterozygote) phenotype that appears silver.' is false because in incomplete dominance, heterozygotes exhibit a phenotype that is a blend of the dominant and recessive traits, not the pure expression of one over the other. The correct option is b.
Step-by-step explanation:
The scenario provided suggests a pattern similar to incomplete dominance where the heterozygote displays a phenotype that is intermediate between both homozygotes. However, incomplete dominance would mean that the heterozygote form (Ff) should express a mixture of the two traits rather than showing the dominant trait purely. Therefore, the fur would not be white or black, but a blend (in this case silver as stated).
The example of coat color in rabbits displays a multiple allele system where various combinations of alleles result in different phenotypes, establishing a dominance hierarchy. Similarly, the snapdragon example illustrates incomplete dominance, where crossing red and white flowers results in offspring with pink flowers.
In both examples, the dominant phenotype isn't purely expressed in heterozygotes, unlike the scenario mentioned in the question. Hence, b is the correct option.