question_answer

Two pea plants were subjected 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

Correct Answer: C

Solution :

Test cross is a cross between homozygous recessive parent and F^ offsprings. The genotypic ratio as well as phenotypic ratio of such cross in 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.