Dominant allele and Recessive allele.....?

If your mother had hemophilia, than she had two defective X chromosomes to begin with (I haven't heard of women getting the disease, though. For them, it would be incompatible with life. As soon as they get a first period, they would die of internal bleeding). If she had only one, she would be a carrier, and you would have a 50% chance of getting the disease.