Question

How would you find the genotype of an organism exhibiting a dominant phenotypic trait?

Answer 1

First a test cross will be done between the dominant phenotypic individual (F₁ hybrid) with recessive phenotypic individual (parent). If the individuals are homozygous dominant, all the individuals in the progeny

If the individuals are heterozygous, the progeny will show dominant phenotype and recessive phenotype in the ratio 1:1.