In a testcross involving "F"(1) dihybrid...

In a testcross involving `"F"_(1)` dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates:

(a) Both of the characters are controlled by more than-one gene

(b) The two genes are located on two different chromosomes.

(d) The two genes are linked and present on the same chromosome

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