Question

A common test to find the genotype of hybrid is by
A) Crossing of one ${F_2}$ progeny with a male parent.
B) Crossing of one ${F_2}$ progeny with a female parent.
C) Studying the sexual behavior of ${F_1}$ progenies.
D) Crossing of one ${F_1}$progeny with male parent.

Answer 1

Test cross is performed to know the genotype of hybrid . In this, we cross the ${F_1}$ generation progeny with the recessive parent (we do not perform selfing in them). In the case of dominant, we get the same ratio for both phenotype and genotype.

Complete answer: Test cross: crossing of ${F_1}$ progeny with the recessive parent. In this cross, the phenotypic and genotypic ratio is the same (that is $1:1$, in both cases). It is used to find out the genotype of the dominant phenotype (in the case of seed color it may be YY or Yy) individual.

**Hence, the correct answer is option (D).

Note: Hybrid vigor is shown by the ${F_1}$ progeny. It means that traits of ${F_1}$ progeny are superior over both the parents traits. Example: They will have more yield than their parent crop, they will exhibit greater biomass. It is also called heterosis.