Question

Question- Please explain in detail.
17. In trihybrid, when all gene show complete linkage then what is ratio of test cross:-
(1)1:1:1:1:1:1:1:1
(2)1:1
(3)1:1:1:1
(4)9:3:3:1

Answer 1

1) is correct because in monohybrid ratio of test cross is 1:1
in dihybrid ratio of test cross is 1:1:1:1as 4 phenotype are produced and in trihybrid ratio will be1:1:1:1:1:1:1:1:1