Acertain bacterium was cultured for several generations in medium containing 15n, transferred to medium containing 14n, and allowed to complete two rounds of cell division. given that the bacterium’s genome mass is 5.4 fg when grown in 14n media and 5.5 fg when grown in 15n medium, individual bacteria with which of the following genome masses would most likely be isolated from this culture? a.5.4 fg onlyb.5.4 fg and 5.45 fgc.5.4 fg and 5.5 fgd.5.45 fg only