In a test cross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant type offspring. This indicates
(1) chromosomes failed to separate during meiosis
(2) the two genes are linked and present on the same chromosome
(3) both of the characters are controlled by more than one gene
(4) the two genes are located on two different chromosomes
(2) When two genes in a dihybrid cross are situated on the same chromosome, the proportion of parental gene combinations are much higher than the non-parental or recombinant type as linked genes are inherited together in offspring.