PEDIGREES
A pedigree is a diagram which shows family structure and can also show
particular traits/characteristics.
Diagram One: Blonde hair in family (shaded shapes denote blonde
hair)
I
mother
II
son
(first born)
III
father
daughter
(daughter’s
husband)
daughter’s children
= female without characteristic
= female with characteristic
= male without characteristic
= male with characteristic
Roman numerals denotes generations. This family has three generations.
Twins are shown using this symbol.
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Northholm Computer/Homefile/Junior Science/Year 10/Genetics/Pedigrees