Question

In mitosis of a single cell, the nucleus

A) enlarges
B) splits into two.
C) splits into four.
D) loses half of its chromosomes.

Answer 1

b splits into two

In mitosis, the nucleus splits into two.

Answer 2

B) splits into two. During the cell cycle the cell's nucleus will make a copy of it's DNA in a stage called the S phase. If a cell starts with 12 chromosomes it will have 24 by the end of the S phase. Next the cell moves through G2 to prepare for cell division and finally mitosis which is the division of the cell's nucleus. Each nucleus will receive a complete set of the original's cell's DNA.