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

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

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.

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

Pedigree Symbols Carrier Female – Fraternal Twins - Identical Twins -

More Pedigree Symbols

Even More Pedigree Symbols