Hemophilia is a sex–linked disorder that is caused by a defective gene on the x chromosome. what will be the pattern of inheritance of the offspring of a hemophiliac father?

Choose the best definition of allele. a. one of several possible versions of a gene, which each produce a different phenotype b. an organism that's purebred for a given trait c. the process of fertilizing a plant with pollen from another plant d. a set of genes that are located on the same chromosome and so are tightly linked