Question

Genotype of dominant trait of plant can be determined by crossing $F_{1}$ hybrid with the parent and the genotypic ratio is

• A. Homozygous dominant trait, 2 : 1
• B. Homozygous dominant trait, 1 : 1
• C. Homozygous recessive trait, 1 : 1
• D. Homozygous recessive trait, all are same

Hint:

Test cross with recessive parent reveals heterozygosity by 1:1 offspring ratio.

Answer 1

The Correct Option is C

To test if a dominant trait is heterozygous, an $F_{1}$ hybrid is crossed with a homozygous recessive (test cross). The resulting 1:1 phenotypic ratio confirms heterozygosity of the dominant parent.