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if two alleles are present the phenotype of only one is expressed (Tall plant height)
if two alleles are present the phenotype expressed is an intermediate of the two (AA=red BB=blue AB=purple)
if two alleles are present both phenotypes are expressed (AA=red BB=blue AB=red and blue stripes)
visual representation of the way a gene moves through a family. can be dominant, recessive or sex linked recessive.
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