Linked Genes Always Exhibit

Question

Linked genes always exhibit:
A)phenotypes that are similar.
B)recombination frequencies of less than 50%.
C)homozygosity when involved in a testcross.
D)a greater number of recombinant offspring than parental offspring when involved in a testcross.
E)a lack of recombinant offspring when a heterozygous parent is testcrossed.

Accepted Answer

Linked genes refer to genes that are located close together on a chromosome and therefore tend to be inherited together. The closer two genes are on a chromosome, the lower the chance that they will be separated during crossing over in meiosis. This results in a lower recombination frequency (less than 50%) between the two genes. Therefore, choice B is the correct answer. Choices A, C, D, and E do not apply to linked genes in general.