Question

Someone who is heterozygous for recessive allele that cause a disorder

Answer 1

Someone who is heterozygous for a recessive allele that codes for a disorder of some sort will not express the disorder in his or her genotype, but would be considered a carrier of the allele, and could pass it on to his or her offspring if the other parent is either heterozygous or homozygous for the recessive allele.