Because when a cell divides it creates something like a mirror image and to do this it needs to copy the most important part of the cell the nucleus (which holds the DNA) and that will determine what the cell needs to do.
If a cell hasn't duplicated it's genetic material before it starts dividing, then there will not be enough genetic material to divide...
So that each cell contains identical genes.
DNA must be copied before cell division so that one complete copy of each chromosome ends up in each of the two daughter cells. Otherwise only one cell would end up with DNA, making the other cell.. well.. not a cell.
Relative Reference
Daughter
DNA must be copied before cell division so that one complete copy of each chromosome ends up in each of the two daughter cells. Otherwise only one cell would end up with DNA, making the other cell.. well.. not a cell.
The Genes determine the nature of the cell's work....Each gene is a blueprint that directs the production.
DNA replicates before a cell divides ensures that each daughter cell has a complete set of genetic material They must have an identical set of DNA.
about half
When a cell divides, each of the daughter cells should contain a copy of the entire genome. This is the reason why a copy of every chromosome has to be made so that one half can go into each daughter cell. If the parent call contained 23 chromosomes for example, during the synthesis phase of the cell cycle (of which prophase is a part), the total number of chromosomes will increase to 46 since each chromosome will be copied. When the cell divides to create two daughter cells, each daughter cell will contain 23 chromosomes.
Cytokenesis
The second strand of a chromosome is a copy of the genetic information for that cell. There are 2 strands so that when the cell divides, there is one copy of each chromosome for each offspring cell.
no. every cell in the body contains the same genes as every other cell in the body
Relative reference
Relative reference
DNA replication occurs because there need to be two identical copies of DNA before the nucleus of the cell divides, so that each new nucleus has a complete and identical copy of DNA.
so that when the cell divides each new cell has a full copy of the DNA
DNA replicates before a cell divides to give a complete set of genetic instructions to each daughter cell.
Telomeres.