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Human Biology yr 11
DNA
Pedigrees
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Pedigree
A diagram that allows us to observe
patterns
of
inheritance
over generations of a family.
open
square =
male
Closed square =
affeted male
Open circle =
female
closed
circle = affected
female
kite
= unknown
sex
single line =
marriage
2 lines = marriage between
cousins
or
siblings
vertical line = offspring
2
vertical line together =
identical twins