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: When a [[genotype]] includes one [[Dominant Allele|dominant allele]] and one [[Recessive Allele|recessive allele]] the physical appearance of the person will be based on the [[Dominant Allele|dominant allele]].
: When there are two copies of the [[Recessive Allele|recessive allele]] the physical appearance of the person will be based on the '''recessive allele'''.
: In a [[Punnett Square]] or [[Genetic Cross Diagram]] '''[[Dominant Allele|dominant alleles''' ]] are written with a capital letter while the [[Recessive Allele|recessive alleles]] are written with a lower case letter.