Who is credited with demonstrating unidirectional and nonreciprocal transfer of DNA between two mating E. coli cells?

Who is credited with demonstrating unidirectional and nonreciprocal transfer of DNA between two mating E. coli cells?

Who is credited with demonstrating unidirectional and nonreciprocal transfer of DNA between two mating E. coli cells? 








A. Hayes
B. Lederberg
C. Tatum
D. none of the choices









Answer: A