Why do cells duplicate chromosomes?

Answer 1

Mostly to make new cells, but they also use it to make RNA which is a working copy. You copy the part of the DNA you want to work with into RNA. Then the RNA is moved to the part of the cell where it's instructions are needed and the amino acids it codes for are made. Eventually those amino acids can be built into proteins.

DNA is the master blueprint of your whole body. It codes for absolutely everything. This makes it very big (on a cellular level) and very, very important. Every cell needs its own copy and it stores that copy in the nucleus.

DNA is too big and too important for everyday use. So, RNA is used. With RNA you are only working with a copy so it is okay if something happens to it. You can always make another. Also. with RNA you only copy the section you need, so you don't have to haul out the whole genome just to make one enzyme.

DNA is only copied into DNA when the cell is splitting into a whole new cell. The it "unzips" its two halves and each cell gets half. When the two cells are totally split they go about replacing that half that they didn't get.

Obviously this is a pretty big understatement and simplification, but you get the idea. :)

The dna is a genetic material and is responsible for the hereditary traits so in order to keep the same quantity in the offspring's the DNA is replicated that is it is copied and distributed squally in their offspring's. The copies of DNA are very important from the poinf of view of evolution.

Cells before going to divide passes through a cell cycle. The cell grows in size while passing through this cycle. During inter-phase the cell grows and makes itself ready for division. It makes the exact copy of DNA by a process of replication. These copies of DNA are passed on to the cells that are formed as a result of cell division.

since DNA holds the genetic code that makes us what we are, DNA copying enable our body to reproduce new cells from old ones as well as reproducing the next generation.

as cell divides the dna also hav to divide to b transfferd in to newly formed cell so for that dna divides

if by any reason the cell does not copy its dna before division the resulting cell could a- be incompatible thus being destroyed automatically

b- be compatible dividing along with the complete one, creating a hybrid or

c- the resulting incompability could destroy both cells

Answer 2

Because both copies of the cell need the full set of DNA! If the DNA didn't duplicate, you'd end up with 2 cells that had half the amount of DNA they should.

Answer 3

If the chromosomes did not duplicate, the new daughter cells would not have the correct amount of genetic information to function.

Answer 4

When one cell becomes two in mitosis, a second set of the genome is needed; therefore, the DNA is replicated.

Answer 5

If you need to duplicate the entire disk, which command will you use ?

Answer 6

Cells duplicate chromosomes in order to achieve cellular replication in either meiosis or mitosis.