It is suggested that the fact that the Y chromosome is smaller than the X, the genes that are found on the X but are not there on the Y means that the male will be more susceptible to inheriting recessive genetic defects found on the mother's X chromosome but not on the male Y which is lacking part of the genetic material because there are no opposing genes to mask it.
Hemophilia is a perfect example. Queen Victoria was a carrier of hemophilia. One of her sons was a hemophiliac. Several of her daughters were carriers and spread the gene throughout the royal families of Europe. He daughter, Alexandra, married Nicholas of Russia and produced four daughters and one hemophiliac son. Since the whole family were slaughtered during the Bolshevik Revolution, it is not know which, if any, of the girls were also carriers. I must admit to not having the factual numbers at hand, but this is the basic story. The sex chromosomes and their influences are a very interesting study. ========================================================= "Magic Commands": to stop receiving mail for awhile, click here and send the email: mailto:[EMAIL PROTECTED]?body=SET%20CKCS-L%20NOMAIL to start it up gain click here: mailto:[EMAIL PROTECTED]?body=SET%20CKCS-L%20MAIL E-mail [EMAIL PROTECTED] for assistance. Search the Archives... http://apple.ease.lsoft.com/archives/ckcs-l.html All e-mail sent through CKCS-L is Copyright 1999 by its original author.
