question_answer

When a tall and red flowered individual is crossed with a dwarf and white flowered individual, phenotype in the progeny is dwarf and white. What will be the genotype of tall and red flowered individual?

A)  TtRr                      

B)         TTRR

C)  TTRr                     

D)         TtRR

Correct Answer: A

Solution :

It is an example of test cross. Test cross is a cross to know whether an individual is homozygous or heterozygous for the dominant character. When double heterozygote (for e.g., TtRr) crossed with double recessive (ttrr), the ratio will be 1 : 1 : 1 : 1.