TEMPLATE
X-Linked Recessive Pedigree
X-linked recessive traits are carried on the X chromosome. Because males have one X, an affected male inherits the changed allele from his mother. Typical clues: the trait appears mostly in males, is passed from carrier mothers to affected sons, and affected fathers do not pass it to sons. This fictional example is educational only.
Related templates
Three-Generation Pedigree
Grandparents, parents, and children with a proband.
Autosomal Dominant Pedigree
Trait appears in every generation; one affected parent usually has affected children.
Autosomal Recessive Pedigree
Unaffected carrier parents can have an affected child; the trait may skip generations.