Y linked inheritance

In Y linked inheritance, only males would be affected, with
transmission being from a father to all his sons via the
Y chromosome. This pattern of inheritance has previously been
suggested for such conditions as porcupine skin, hairy ears,
and webbed toes. In most conditions in which Y linked
inheritance has been postulated the actual mode of inheritance
is probably autosomal dominant with sex limitation. Genes
involved in male development and spermatogenesis are carried
by the Y chromosome, but the mode of inheritance is not
demonstrated because of the associated infertility.