Sex Chromosomes Determine sex of individual XX= Female, XY= Male Autosomes- any of the other chromosomes that are not the X or Y

Sex-linked Inheritance Genes can be carried on the sex chromosomes Sex-linked disorders Adrenoleukodystrophy Hemophilia Color-blindness Duchennes Muscular dystrophy

Completing a Punnett Square for sex-linked traits Rules Always make sure that there is an X X for the mother, and an X Y for the father. Always put the capital letter first, ex. XHXh Do not include a letter on the Y (SUPER rare to have any noticeable traits on the Y) Use the same rules as regular Punnett squares: capital letter= dominant trait, capital letter presence will always result in dominant trait showing

Example A woman who is a carrier for hemophilia, a recessive sex-linked disorder has a child with a normal man. What are the chances that they will have a child with the disease?

Sex-linked Punnett square