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Why is a testcross necessary to determine genotype when an organism shows a dominant trait?
a. phenotype has nothing to do with genotype.
b. an organism with a dominant trait will always have two dominant alleles.
c. an organism only needs one dominant allele to show the dominant trait.
d. testcrosses aren't required when dominant traits are present
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Why is a testcross necessary to determine genotype when an organism shows a dominant trait?
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