question_answer

In corn, three enzymes catalyse the same reaction. Corresponding genes \[\left( {{a}^{+}},{{b}^{+}}and\,{{c}^{+}} \right)\]are located on three different chromosomes. The reaction is as follows:  Colourless compound\[\xrightarrow{}\]red compound The normal functioning of any one of these genes is sufficient to convert colourless compound to the red compound. The mutant alleles of \[{{a}^{+}},{{b}^{+}}\] and \[{{\operatorname{c}}^{+}}\] are a, b and c respectively. If red\[\left( {{a}^{+}}/a,{{b}^{+}}/b,{{c}^{+}}/c \right)\] plants are selfed, what proportion of progeny will be colourless?      

A) 1/8

B)  1/16            

C) 1/64     

D)  1/4