Respuesta :
To assess if an organism expressing a dominant characteristic is homozygous or heterozygous, a test cross can be used.
Back crosses are made between F1 generation plants and any of the parent plants, whereas test cross is made between F1 generation plants with dominant phenotypes and the homozygous recessive parent.
The phenotypes of the children can be used to identify the unknown genotype. If combining the recessive phenotype individual with the unknown dominant phenotype (PP or Pp genotype) results in solely dominant phenotypes (no recessive), then the unknown individual is homozygous dominant.
No matter if you are examining one gene or several genes, test crosses work on the same principle: you are pairing a person with a dominant phenotype but an unknown genotype with a person who is homozygous recessive for all relevant genes.
To learn more about Test cross please visit - https://brainly.com/question/14438101
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