Which of the Following Does NOT Typically Involve Horizontal Gene

Question

Which of the following does NOT typically involve horizontal gene transfer?
A) Sexual reproduction in humans
B) Bacteriophage infection of bacteria
C) The evolutionary history of the eukaryotic cell
D) The accidental duplication of a small region of a bacterial chromosome followed by cell division
E) Introduction of plasmids into bacteria in a laboratory

Accepted Answer

Introduction of genes into bacteria or eukaryotes by viral infection or artificially in the laboratory are examples of horizontal gene transfer, as is sexual reproduction between members of the same eukaryotic species. A great deal of horizontal gene transfer has occurred during the evolution of eukaryotic cells, such as in the process that led to the development of mitochondria (see Figure 12-3).