Scientists attempted for many years to conduct nuclear transplants but failed.However,geneticists at the Roslin Institute in Scotland had success in cloning a sheep.They were successful because they
A)picked a cell very early in development.
B)replicated the blastomeres before insertion.
C)delayed transcription in the blastomeres.
D)treated the nucleus with sheep plasma before nuclear insertion.
E)utilized a new micro pipette techniquE.

Question

Quizplus · Accepted Answer

Picking a cell very early in development, such as a blastomere from an embryo at the 8-cell stage, allowed the geneticists to successfully clone a sheep. This is because early stage cells have not yet undergone significant differentiation or undergone irreversible changes in gene expression, making it easier to reprogram the cell to develop into a full organism.

Scientists Attempted for Many Years to Conduct Nuclear Transplants but Failed.However,geneticists