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

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

3. 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

4. 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?

5. Sex-linked Punnett square