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Why must cells duplicate the DNA before entering mitosis or meiosis?
Wiki User
∙ 12y ago
This process of replication is important, it provides a method for cells to transfer an exact duplicate of their genetic material from one generation of cell to the next.
The copies of the cell are called the daughter strands, they contain half of the parent DNA molecule and half of a whole new molecule. This is called Semiconservative replication.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoBecause when a parent cell undergoes mitosis it divides into two daughter cells and they all need DNA thats why before mitosis takes place there must be a duplicate of the DNA
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What must happen before meiosis or mitosis can take place?
Before Meiosis 2, the cell must first go through Meiosis 1. This is when the cell splits into two cells, each with two chromosomes.
Before mitosis or meiosis DNA coils into what?
Before mitosis and meiosis, DNA is loose in the form of chromatin, then it coils into chromosomes right before the mitosis and meiosis.
Which phase occurs before mitosis or meiosis?
Inter-phase occurs before mitosis or meiosis.
Wich statement is true of both mitosis and meiosis?
DNA replication occurs before the division of the nucleus.
In what stages of the reproductive process does meiosis occur?
in the production of eggs and of sperm the mitosis stage before the chromosomes are copied
What must happen before meiosis or mitosis can take place?
Before Meiosis 2, the cell must first go through Meiosis 1. This is when the cell splits into two cells, each with two chromosomes.
Before mitosis or meiosis DNA coils into what?
Before mitosis and meiosis, DNA is loose in the form of chromatin, then it coils into chromosomes right before the mitosis and meiosis.
Which phase occurs before mitosis or meiosis?
Inter-phase occurs before mitosis or meiosis.
How many times chromosomes replicate in meiosis?
They replicate before meiosis begins, as it is the division phase. The chromosomes duplicate during interphase which is right before the beginning of meiosis. After going through meiosis I the chromosomes DO NOT duplicate nor do they cross over they simply continue on. Hope this helps. :)
Why is it important for the chomosome to make copies of themselves BEFORE mitosis occurs?
Because it has to duplicate itself before it goes through the process of mitosis.
What happens before meiosis begin?
Interphase. The process of meiosis has many similarities to the process of mitosis: chromosomes replicate before the process begins, and shorten and thicken to look like the chromosomes at the beginning of mitosis (condensation).
What stage of mitosis does replication happen in?
Replication does not take place during mitosis. It takes place before meiosis begins.
Why meiosis is called modified mitosis?
Meiosis is very similar to mitosis. Meiosis produces two "half-cells" after the first cell division. Mitosis, however produces two fully genetically capable cells. After mitosis, the cell products can reproduce by themselves. Meiosis is a "modified" version of mitosis, meant for genetic diversity. Mitosis probably existed way before meiosis, simply because it is easier to execute. Meiosis produces what is called a gamete. These gametes, or 'sex cells' cannot reproduce by themselves. These half-cells are meant to be combined with the complementary gamete (egg with sperm) to maximize genetic diversity and promote evolution. Mitosis is the simplified version of meiosis, and meiosis is the "modified" mitosis. You often find mitosis in simple organisms, meant solely for reproduction purposes. Meiosis is more common in evolutionarily advanced organisms, such as mammals.
When are chromosome duplicate before or during mitosis?
Chromosomes are duplicated before mitisis in S phase of inter phase .
Why are chromosomes replicated before Mitosis but not prior to Meiosis II?
Because it wants too
Is meiosis an adaptation of mitosis?
The origin of meiosis does not have one widely accepted theory. There is a theory that meiosis is an adaptation of mitosis. However, this theory does not have a lot of support. There are several mechanisms that are similar in mitosis and meiosis, for example they go through similar phases of prophase, metaphase, etc. Mitosis is believed to have originated about 3 billion years before meiosis. However, there are also important differences. The most obvious difference is the end result - mitosis produces two genetically identical daughter cells, whereas meiosis produces four haploid daughter cells.
5 different between mitosis and meiosis and 5 same between mitosis and meiosis give me a list plz?
Differences: # Cells undergoing mitosis divide once, cells undergoing meiosis divide twice. # Mitosis is for cell replication, meiosis is for genetic recombination and to produce reproductive cells # Meiosis does not produce exact copies, mitosis does # Crossing over occurs in meiosis # Mitosis produces diploid cells, meiosis produces haploid Similarities: # Both duplicate the organism's genome once, before any duplication occurs # Metaphase plates occur in both # Centrioles exist in both # They share the same basic steps for division # Both occur in eukaryotic cells
