In the first successful cloning of a sheep, cells from the ewe's udder were modified to become appropriate donor cells. In order for these udder cells to be suitable donor cells, they were
A) arrested in the G1 phase of the cell cycle.
B) arrested in the G2 phase of the cell cycle.
C) supplied with extra nutrients.
D) Both a and c
E) Both b and c

Question

Quizplus · Accepted Answer

In order for the udder cells to be suitable donor cells, they needed to be arrested in the G1 phase of the cell cycle to allow for reprogramming to occur. Providing them with extra nutrients (choice C) was not a necessary part of the process. Therefore, choice D and E can be eliminated.

In the First Successful Cloning of a Sheep, Cells from the Ewe's