Zoology - Principles of Inheritance and Variation Question with Solution | TestHub

A common test to find the genotype of a hybrid is a test cross. Here, ${\mathrm{F}}_1$ hybrids are crossed with the recessive parent. Phenotypic ratios of $1:1$ confirm that the ${\mathrm{F}}_1$ hybrid is heterozygous. $$\text{ Related Theory }$$
Caution This is a misleading question. Students consider the question as wrong, as they miss the word recessive parent. However, they do not realise that test cross is cross between $F_J$, hybrid progeny with recessive parent, and $F_s$ is only present in option $(\mathrm{C})$.