Genetic Symbols

Family studies or pedigree charts can be useful in determining inheritance within families. Pedigree charts make use of symbols that follow certain conventions (Chart 1-1).

Terms to look up

• chimera

• consanguineous

• dizygotic twin

• index case

• monozygotic twin

• proband

• proposita

• propositus

Classical Genetics

Genetic Symbols

Inheritance Patterns