Our cells have 23 pairs of chromosomes to replicate for cell division. While picking apples in the orchard, you accidentally cut your hand on a sharp twig. Your skin must make new cells to heal the cut.
What part of the cell cycle is shown and how many pairs of chromosomes are in the new formed cells?
a
G1 Checkpoint- checking cell size and for enough proteins, 46 pairs of chromosomes
b
M-complete cell division, 23 pairs chromosomes
c
G2 Checkpoint- checking cell size and DNA replication, 46 pairs of chromosomes
d
S- duplication of the DNA, 23 pairs chromosomes
d) S- duplication of the DNA, 23 pairs chromosomes
The correct answer is d) S- duplication of the DNA, 23 pairs chromosomes.
When you accidentally cut your hand, your skin cells need to make new cells to heal the cut. This process involves cell division, specifically the cell cycle. The cell cycle consists of several phases, including the S phase, in which DNA replication occurs.
During the S phase, the DNA in the cell is duplicated. This means that the number of chromosomes remains the same, but each chromosome doubles, forming two identical sister chromatids. In your case, since human cells have 23 pairs of chromosomes, the number of pairs of chromosomes in the newly formed cells would still be 23.
Therefore, the correct part of the cell cycle shown in this scenario is the S phase, where DNA duplication occurs, and the number of pairs of chromosomes in the new formed cells remains the same, which is 23.