Question

You are carrying out experiments in cell fusion by fusing together cells at different stages of the cell cycle. You then observe the behavior of each nucleus residing in the combined cytoplasm of the two cells. Which of the following results reflects what would occur if you fused a G_2 cell to a cell in the M phase?

a.The nucleus from the G_2 cell would start to replicate its DNA.
b.The G_2 chromosomes would undergo premature chromosome compaction.
c.The G_2 chromosomes would decondense.
d.The G_2 chromosomes would be elongated and would consist of only one chromatid each.

Answer 1

b.The G_2 chromosomes would undergo premature chromosome compaction.

Step-by-step explanation:

If 2 different cells out of which one which is in M phase (mitotic phase) and another one which is in G2 phase of cell cycle are fused together then the cell which is in G2 phase will make an early entry into the mitotic phase. In mitotic phase, the genetic material in the nucleus, condense and become visible. Since, G2 phase cell has entered mitotic phase early so it's chromosomes would undergo premature chromosome compaction.