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22-10-2016
Biology

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clarify why test crosses are used in selective breeding.

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emmarobert emmarobert

22-10-2016

A test cross can be used to determine the genotype of the parent (whether it is homozygous or heterozygous for a specific trait).
AA x aa = all Aa offspring, dominant phenotype.

Aa x aa = 1/2 Aa dominant and 1/2 aa recessive

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