1. Pedigree Lecture Pedigree –
Chart which shows family history of a trait

2. Sample Pedigree NOTE: Shaded symbols have trait being tracedF1 F2
NOTE: Shaded symbols have trait being traced
P generation =
F1 generation =
F2 generation =
“Parents”
First generation of kids
Grandkids; second generation

3. Sample Pedigree
NOTE: Each generation is assigned a roman numeral and each individual also receives a number.
Ex. Person I-2 has the trait while Person II-3 does not.

4. Pedigree Symbols Without trait Female – Has trait Male – Without trait
Marriage or
mating line –
Death –
Hybrid –

5. Pedigree Symbols
Carrier
Female –
Fraternal
Twins -
Identical Twins -

6. More Pedigree Symbols

7. Even More Pedigree Symbols