Incomplete Dominance
• Heterozygotes are a 3rd
intermediate phenotype
Codominance
• Heterozygotes present both
phenotypes
• Is this a picture of
a Co-dominant
trait Incomplete
dominant trait?
Multiple Alleles
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•
•
•
More than 2 alleles exist for one trait
Not just one dominant allele and one recessive
Leads to more diverse mixture of alleles
Ex: Blood Type
–A
–B
–O
Inheritance of Blood Type
What is a pedigree?
Pedigree = a family history that shows how a
trait is inherited over several generations.