Final answer:
25% of the puppies could have white fur.
Step-by-step explanation:
In this case, two heterozygous pomeranians will have a litter of puppies. Orange fur (L) is dominant over white fur (l). Since each parent is heterozygous, they will each pass on either an orange (L) or white (l) allele to their offspring.
So, when these two heterozygous pomeranians mate, there is a 25% chance that both parents will pass on the white (l) allele to their offspring, resulting in puppies with white fur. Therefore, 25% of the puppies could have white fur.