Is there only one DNA replication in meiosis?
912340
There is only one DNA replication, as the ending 4 cells all have only half the number of chromosomes (haploid number)
502976
Asexual reproduction: only one parent is involved, and the offspring have the same DNA, as the parents. Basically, the offspring are exactly like the parents.
1135410
DNA replication occurs when the cell needs to reproduce.  When the volume of the cell outgrows its surface area, a set of chemical signals are sent out notifying the DNA to begin replicating.  Asexual reproduction (fission) is the most common form of cell asexual reproduction.  Before sexual reproduction can occur you must first produce the gametes (sperm-eggs).  Here the DNA is replicated but then it is cut in half to produce the haploid gametes.  When the sperm and egg unite then the full complement of DNA returns.  This is not true in fission.
1018240
none\n\n\nyou start with one pair of homologous chromosomes in prophase I of meiosis I.  at metaphase I, these homologues line up across the metaphase plate, and at anaphase, they seperate so that one homologue goes to one pole, and the other homologue goes to the other pole.  after cytokinesis at the end of telophase I, you have one homologue in each cell...that homologue then goes through meiosis II, and at metaphase II, that homologue lines up at the metaphase plate with each sister chromatid facing each pole, and the chromosome is "pulled apart".  Anaphase II pulls the sister chromatids to each pole, and cytokinesis splits the one cell into two....two cells, each containing one sister chromatid of a homologous pair. (although in some text books this is refered to as a single homologue)
148014
Mitosis and meiosis are sometimes called the two "nuclear division" processes
681765
Disregard the first two posters at the top.  They don't know that mDNA is "mitochondrial" DNA.\n\nThe third poster is correct in that replicates it's DNA in a way similar to that of bacterial.  It does divide by binary fission, but it has no organelles to reproduce.  An important point is that mitochondria in a single cell tend to divide at the same time but this is completely independent of the mammalian cell's division.  Thus the nucleus and mitochondria divide at different rates and different times.
258433
mitosis is asexual reproduction, cells divide and reproduce replicating their own DNA exactly\n\nmeiosis is sexual reproduction, new cells contain only half of their original DNA, and half from a different parent source
938356
Cells reproduce by cell division. This is called a-sexual reproduction or binary fission or Mitosis. This type of reproduction only requires one induvidual. The cell divides in order two create two daugter cells that are identical to the original cell. First Interphase, when the cell is making copies of DNA. In Prophase, the nucleolus fades and the chromatins condense into chromosomes. In Metaphase, all the chromosomes are aligned on spindle fibers. In Anaphase, the spindle fibers dissaspear. In Telophase, the daughter chromosomes move to the poles. In Cytokinesis, not truly part of Mitosis, there are now two finallized daughter cells.\n______________________\nHope this helps!!! :) :) \nHere's for more information:  http://www.cellsalive.com/mitosis.htm
396880
DNA duplicates during inter phase of cell division to prepare the cell for mitosis
759610
Mitosis:\n\nOccurs during cell division of somatic cells\n\nA full set of chromosomes is passed on to each daughter cell. This s the diploid number of chromosomess\n\nthe choromosomes and genes in each daughter cell are identical.\n\nIf new organisms are produced by mitosis is asexual reproduction they will all resemble each other and their parents. they are said to form a 'clone'.\n\n\nMeiosis;\n\nOccurs in the final stages of cell division leading to production of gametes.\n\nOnly half the chromosomes are passed on to the daughter cells, i.e. the haploid number of chromosomes.\n\nThe homologous chromosomes and their genes are radomly assorted between the gametes.\n\nNew organisms produced by meiosis in sexual reproduction will show variations from each other and form their own parents.
65963
During meiosis, sexually reproducing organisms choose one of the two versions of each chromosome they have (the two versions are supplied because each parent provides one copy of each chromosome) to be included in the haploid gametes. Because one copy of two possible choices has to be made for each of the 4 chromosomes (diploid number of 8 is referring to the fact there are 2 copies of each of 4 chromosomes meaning 8 total). \n\nTo figure out the number of possible combination you use a simple probability formula. \n\nThere are 2 choices for the first chromosome location x 2 possible choices for the second location x 2 possibilities for the third location x 2 possibilities for the final location\n\n2x2x2x2 = 16 possible combinations that can be made in any one gamete.\n\nOf course this is the absence of any crossing over event, which can produce an incalculable number of possible rearrangements.
457393
mitosis is the process of nuclear division in which the chromosomes replicate and become equally distributed into two daughter so that they hane the same number and type of chromosomes as present in the parent. it was first observed by Strasburger(1870) in plants and by Boveri & Fleming(1879) in animal cells... its also known as somatic division as it involves only the somatic body cells, also since its keeps the chromosome numeber the same its also known as equitorial division..\n\n\nmeiosis occurs in diploid cells and gives rise to four haploid nuclei, each havin n/2 number of chromosomes, here n is the number of chromosomes.. in this the nuclei divides twice but the chromosomes are replicated only once....\n\nits divided into 2 stages\n1. Meiosis 1\n2. Meiosis 2\n\neach have a number of sub stages..\n\nthere are 1000's of major differences, i'll sorting them, its upto u to remember the one... and as far as the pneumatic device is considered, it's common 2 all of us..\n\n\n1. Mitosis takes place in somatic cells, whereas Meiosis in reproductive cells.\n\n2. mitosis occurs in both haploid & Diplois, meiosis in diploid only.\n\n3. 2 & 4 daughter cells produced resp..\n\n4. CHROMOSOMES REPLICATE IN THE INTERPHASE BEFORE EVERY DIVISON IN MITOSIS BUT IN MEIOSIS THEY REPLICATE ONLY ONCE PRIOR TO MEIOSIS.
825948
Penguin says >>\n\nOogenesis is the process of females creating egg cells... When women are born, they have a lot of cells that of those egg cells, only a few will undergo meiosis and form egg cells. Meiosis, yes, does form four haploid cells from each one of those "pre-made egg cells". All those four haploid cells has 23 chromosomes. However, Meiosis only ensures that there are enough chromosomes for the offspring, and not necessarily the quality of the egg cell... \n\nWhat I mean is >> The larger egg cell containing more cytoplasm lives, while the other doesn't develope into an ovum. \n\nIn Meiosis I, the original cell divides into two, with 46 chromosomes. Meiosis does not seperate into two equal cells, as they do in mitosis. The larger cell then splits again [Meiosis II], and of the two haploid cells that result from Meiosis II, the larger one lives again. So, only one gamete is formed, though of the 4 haploids, 3 of the haploids degenerate. \n\n-- Cytokinesis isn't part of mitosis...Mitosis is part of the cell cycle, which has 3 steps :: interphase, mitosis, and cytokinesis. \n\nRemember that mitosis is the process of splitting a cell's nucleus. \n\nand remember that cytokinesis only splits two cells in half by pinching the cell membrane...\n\nSo... there's a difference. \n\nThank -you-\n\n<< Penguin waves good bye.
934654
DNA replication occurs during the "S" phase (or Synthesis phase) of the cell cycle.\n\nGood luck.
163339
A chromosome is a WHOLE DNA molecule, so an allele has one molecule (one chromosome)
972775
In short Meiosis and Fertilisation.\n\nFertilisation brings each haploid gamete cell together, that is, a sperm and an egg. Each of these gametes carries a single copy of each chromosome. It is not until fertilisation that the chromosomes from each parent come together to form the diploid embryo.\n\nBut it's important to note that although we are walking around with 2 copies of our chromosomes, our gametes only have one. This is because the gametes are formed through the process of Meiosis, which halves our DNA. This allows the offspring to have a copy of each chromosome from each parent.
885418
D is definitely the false answer because, in Meiosis I, the homologous chromosomes are seperated. The chromosomes are divided in Meiosis II. The seperating of the two homologous chromosomes into different daughter cells cause the number of chromosomes to be halved.\n\nE is definitely correct because the daughter cells are different from each other due to cross-over and also because of the seperation of homologous chromosomes.