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A segment of DNA that has the ability to code for a specific trait.
This type of allele is expressed whether there are one or two copies present.
A variety or form of a gene.
Humans have _______ pairs of chromosomes, for a total of _______ chromosomes.
The physical expression of a trait.
What are used to represent dominant alleles?
Since the narrator of the Amoeba Sisters cannot taste PTC, what is her genotype?