Explanation: DNA replication needs to occur because existing cells divide to produce new cells. … So the DNA needs to be copied before cell division so that each new cell receives a full set of instructions!
Why is it important that the DNA is replicated before mitosis?
Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell. The replication process relies on the fact that each strand of DNA can serve as a template for duplication.
Why is it important for DNA to be replicated prior to mitosis quizlet?
Cell replication is necessary before cell division so that the daughter cells have the correct number of chromosomes. … Cell division must occur for growth, repair, and reproduction.
What happens to DNA in each stage of mitosis?
This process involves replication of the cell’s chromosomes, segregation of the copied DNA, and splitting of the parent cell’s cytoplasm. … The outcome of binary fission is two new cells that are identical to the original cell.
What would happen if a cell divides before DNA replication is completed?
DNA replicates before a cell divides so that each daughter cell receives a complete set of genetic information. -If a cell does not successfully pass a checkpoint, the cell cycle may stop, or the cell may enter apoptosis and die. … & accurately replicated?
What are the 3 main steps in DNA replication?
How is DNA replicated? Replication occurs in three major steps: the opening of the double helix and separation of the DNA strands, the priming of the template strand, and the assembly of the new DNA segment.
How much DNA is present in each phase of mitosis?
Recall that DNA is replicated during the S phase of the cell cycle. Thus during metaphase of mitosis, each chromosome (i.e., each chromatid pair) will contain two molecules of double stranded DNA (one molecule per sister chromatid).
What are the stages of mitosis and what happens in each stage?
1) Prophase: chromatin into chromosomes, the nuclear envelope break down, chromosomes attach to spindle fibres by their centromeres 2) Metaphase: chromosomes line up along the metaphase plate (centre of the cell) 3) Anaphase: sister chromatids are pulled to opposite poles of the cell 4) Telophase: nuclear envelope …