Sex-Linked traits are recessive traits generally carried on the X chromosome. Females have two X chromosomes, so they need to have the gene on both X chromosomes to show the trait. If only one X chromosome has the gene, the female is a carrier. A male only has one X chromosome and a Y chromosome. This means that the male only needs one X chromosome with the gene to show the trait. X X What are the chances they will have a son? 74= 50% What are the chances they will have a daughter ?14 = _50_%