Q. Two pea plants were subjected for cross pollination. Of the 183 plants produced in the next generation,94 plants were found to be tall and 89 plants were found to be dwarf. The genotypes of the two parental plants are likely to be

A) TT and tt
B) Tt and Tt
C) Tt and tt
D) TT and TT
Explanation

Test cross is a cross between homozygous recessive parent and F1 offsprings. The genotypic ratio as well as phenotypic ratio of such cross is 1 : 1. Analysis of the given data in question shows almost 1 : 1 (94:89) ratio. Hence, the genotype of the two parents will be Tt and tt.

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.