In a testcross,if all the offspring show the dominant phenotype,then the individual with the unknown genotype was

Name: In a testcross,if all the offspring show the dominant phenotype,then the individual with the unknown genotype was
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In a testcross, an individual with an unknown genotype is crossed with a homozygous recessive individual. If all offspring show the dominant phenotype, it means the unknown genotype must have been homozygous dominant, as only dominant alleles were passed to the offspring.

In a Testcross,if All the Offspring Show the Dominant Phenotype,then