Pedigree charts are great for determining if there is any genetic link to the disease of an affected patient. Or what type of inheritance patter there is.
Sex linked diseases would affect mainly the male line & daughters would most often be carriers.
Autosomal recessive would mean that the affected patients would need to inherit the disease from 2 carrier parents that are typically asymptomatic.
Autosomal dominant would show affected children coming from affected parents. It only takes 1 gene to trigger the disease.
Hope this helps!