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Clarify why test crosses are used in selective breeding.

Clarify why test crosses are used in selective breeding.
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Clarify why test crosses are used in selective breeding.

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User David Brochart
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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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User Searene
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