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31 December, 23:56

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

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  1. 1 January, 00:12
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    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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