What is test cross ?
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A test cross is a cross between a recessive parent and an organism with an unknown genotype. It's used to see if someone is homozygous or heterozygous for a particular trait.
The phenotypes of the children, for example, can be used to determine the unknown genotype.
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A test cross is a way to explore the genotpye of an organism. Early use of the test cross was as an experimental mating test used to determine what alleles are present in the genotype. ... Consequently, a test cross can help determine whether a dominant phenotype is homozygous or heterozygous for a specific allele.
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