People with klinefelter syndrome have three or more sex chromosomes instead of the normal two. They have two or more X chromosomes and a Y chromosomes. It cannot be properly inherited because one of the symptoms is infertility. It is gained through a mutation in the sex chromosome when an extra X chromosome. Since the disease is not inherited it is neither dominant or recessive and the parents genotype is for the mother XX and for the father XY. Since the person with the disease is infertile it cannot be passed on to their offspring.