question_answer

In an organism, tall phenotype is dominant over recessive dwarf phenotype and the alleles are designated as T and t, respectively. Upon crossing two different individuals, total 250 offsprings were obtained, out of which 124 displayed tall phenotype and rest were dwarf Thus, the genotype of the parents were

A) \[TT\times TT\]          

B)  \[TT\times tt\]

C) \[Tt\times Tt\]           

D)  \[Tt\times tt\]

Correct Answer: C

Solution :

 The cross between recessive homozygous parent and \[{{F}_{1}}\]hybrid (heterozygous)  individual is called test cross and it gives only one type of result, i.e., 1:1 in any case.