A common test to find the genotype of a hybrid is by:

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. $\text{ Related Theory }<img src="/api/proxy-image?url=https$ \\ 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 $(\mathrm{C})$.