question_answer

When tall and dwarf plants are crossed, from which cross 1:1 ratio is obtained?

A) \[Tt\]and\[tt\]                                 

B) \[tt\]and\[tt\]

C) \[Tt\times Tt\]                                 

D) \[TT\]and\[Tt\]

Correct Answer: A

Solution :

The cross between \[Tt\] and \[tt\] (test cross) will show \[1:1\] ratio. Test cross is performed to know weather the parent is homozygous or heterozygous dominant.