In a certain population of rabbits, the ratio of the phenotypes of brown fur and white fur is 1:1. What is the frequency of the white fur trait in the rabbit population?

1%

50%

25%

100%

The frequency of the white fur trait in the rabbit population is 50%. This is because the ratio of brown fur to white fur is 1:1, meaning that for every rabbit with brown fur, there is also a rabbit with white fur. Therefore, both phenotypes are equally represented in the population, resulting in a frequency of 50% for each phenotype.