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

Options

A. Chromosomes failed to separate during meiosis
B. The two genes are linked and present on the same chromosome
C. Both of the characters are controlled by more than one gene
D. The two genes are located on two different chromosomes

Answer

B

Explanation

Translocation is the process causig a gene to move from one linkage group to another. It is the separation of a chromosome segmetn and its union to a non-homologous chromosome. It is of two type-simple and reciprocal. In simple translocation one chromosome shows deletion or deficiency while a non-homologous chromosome comes to hae an additional segment. In reciprocal translocation two non homologous chromosomes exchange segments between themselves to create new linkage groups in both the chromosomes.