Inheritance of Rabbit Fur Color Gene

Explanation:

In rabbits, the gene for black fur is dominant (F), but the gene for white fur is recessive (f). This means that in order for a rabbit to have white fur, it must carry two genes for white fur. In the case of a white rabbit, both of its genes for fur color would be the recessive gene for white fur (f).

Therefore, the correct answer is A. Two genes for white fur. This is because in order for the white fur trait to be expressed, both genes in the rabbit's genetic makeup must be for white fur.