Ans-
Rr ×
Rr                      Â
Yy ×
Yy            Â
        Tt ×Tt
        Â
                    Ss
× Ss
1RR:2Rr: 1rr    Â
     1YY:2Yy:1yy          Â
       1TT:2Tt:1tt
                 Â
1SS:2Ss:1ss
2/4
Rr                          Â
2/4
Yy          Â
2/4
Tt                       Â
1/4ss
Probability of obtaining individual with Rr and Yy and Tt and
ss
2/4 × 2/4×   2/4 × ¼= 8/256= 1/32
Therefore, the probability of obtaining genotype RrYyTtss in the
F2 is 1/32
.