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Representative pedigrees for two characteristics, each followed through three generations

Description
(a) Autosomal Recessive Trait
(b) Autosomal DominantTrait
Either I-3 or l-4 must be
heterozygous
Recessive traits typically
skip generations
Flecessive autosomal traits
appear equally in both sexes
H is heterozygous
for a dominant allele
Dominant traits almost
always appear in each
generation
* Affected individuals all
have an affected parent.
11 Dominant autosomal
traits appear equally in
both sexes
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