Pedigree Symbols
Symbol
Description
Unaffected male
Unaffected female
Affected male
Affected female
Deceased male
Deceased female
Possibly affected male or unknown
Possibly affected female or unknown
Carrier male of autosomal recessive disorder
Carrier female of autosomal recessive disorder
Carrier female with an X-linked disorder
Sometimes these symbols will be used in families with 2 different disorders – each half will tell
whether the person is affected for that disease.
Connected Symbols:
Twins
Divorced Couple
Married couple
Siblings
Source:
Coriell Institute for Medical Research. Pedigree Symbol Definitions. 1998.