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ankoles [38]
3 years ago
6

Why is a testcross necessary to determine genotype when an organism shows a dominant trait

Biology
1 answer:
soldier1979 [14.2K]3 years ago
8 0
A dominant trait can be shown both when an organism is homozygous dominant AND heterozygous. Two different genotypes give the same visible result so a testcross is needed to be able to accurately say if the organism is homozygous dominant or heterozygous
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