Pedigree analysis: Study of traits in a several of generations of a family  in the form of family tree diagram , is called the pedigree analysis.

Pedigree analysis is a strong tool to:

1) Cure many genetic disorders.

2) Trace the inheritance of a specific trait in a family.

3) Many abnormalities.

4) Know the possibilities of recessive allele that can cause genetic disorders like colour blindness, haemophilia, etc.

Symbols used in the human pedigree analysis: