A cell that contains synapsis, tetrads, and chiasmata.  What phase is the cell in?
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Meoisis I specifically prophase I.
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Meiosis Tutorial \nDNA replication precedes the start of meiosis I. During prophase I, homologous chromosomes pair and form synapses, a step unique to meiosis. The paired chromosomes are called bivalents, and the formation of chiasmata caused by genetic recombination becomes apparent. Chromosomal condensation allows these to be viewed in the microscope. Note that the bivalent has two chromosomes and four chromatids, with one chromosome coming from each parent. The nuclear membrane disappears. One kinetochore forms per chromosome rather than one per chromatid, and the chromosomes attached to spindle fibers begin to move. Bivalents, each composed of two chromosomes (four chromatids) align at the metaphase plate. The orientation is random, with either parental homologue on a side. This means that there is a 50-50 chance for the daughter cells to get either the mother's or father's homologue for each chromosome.Chiasmata separate. Chromosomes, each with two chromatids, move to separate poles. Each of the daughter cells is now haploid (23 chromosomes), but each chromosome has two chromatids. Meiosis Tutorial \nA review of Meiosis \nComparing Meiosis and Mitosis\nChromosome behavior \nMitosis: Homologous chromosomes independent \nMeiosis: Homologous chromosomes pair forming bivalents until anaphase I \nChromosome number- reduction in meiosis \nmitosis- identical daughter cells \nmeiosis- daughter cells haploid \nGenetic identity of progeny: \nMitosis: identical daughter cells \nMeiosis: daughter cells have new assortment of parental chromosomes \nMeiosis: chromatids not identical, crossing ove \nMeiotic errors\nNondisjunction- homologues don't separate in meiosis 1 \nresults in aneuploidy \nusually embryo lethal \nTrisomy 21, exception leading to Downs syndrome \nSex chromosomes \nTurner syndrome: monosomy X \nKlinefelter syndroms: XXY \nTranslocation and deletion: transfer of a piece of one chromosome to another or loss of fragment of a chromosome. \n\nMitosis, Meiosis, and Ploidy\nMitosis can proceed independent of ploidy of cell, homologous chromosomes behave independently \nMeiosis can only proceed if the nucleus contains an even number of chromosomes (diploid, tetraploid). \nTrisomy 21 does not prevent meiosis
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nucleus, cytoplasm and protoplasm ....
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G1 - chromatin\nS - chromosomes\nG2 - chromatin\nMitosis - chromosomes (the chromosomes become less condensed in telophase though)\nCytokinesis - chromatin\n\nDuring all three subphases, the cell grows by producing protiens and cytoplasmic organelles such as mitochondria and endoplasmic reticulum.  However, chromosomes are duplicated only during the S phase.  Thus, a cell grows (G1), continues to grow as it copies its chromosomes (S), grows more as it completes preparations for cell division (G2), and divides (M).  I'm guessing cell growth is fastest in G1 but im not sure, so dont quote me.\nHope I helped =)
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meiosis (mīŏ'sĭs) , process of nuclear division in a living cell by which the number of chromosomes is reduced to half the original number. Meiosis occurs only in the process of gametogenesis, i.e., when the gametes, or sex cells (ovum and sperm), are being formed. Because fertilization consists of the fusion of two separate nuclei, one from each of the sex cells, meiosis is necessary to prevent the doubling of the chromosome number in each successive generation. An ordinary body cell is diploid; i.e., it contains two of each type of chromosome. The members of each pair are known as homologous chromosomes. An ovum or sperm is haploid; i.e., it contains only a single chromosome of each type and, therefore, half the number of chromosomes of the diploid cell. When the two haploid cells fuse, the diploid number is restored, and the plant or animal growing from the fertilized egg (zygote) has the usual diploid number of chromosomes in its cells. Just before meiosis each chromosome replicates to form two identical copies in the form of strands called chromatids joined together at a point called the centromere. In the first stage of meiosis, called the reduction division, the members of each pair of homologous chromosomes lie side by side and crossing over occurs. Each member of the pair then moves away from the other toward opposite ends of the dividing cell, and two nuclei, each with the haploid number of double-stringed chromosomes, are formed. Thus at the beginning of the second meiotic sequence, called the equational division, each cell nucleus contains one chromosome from each homologous pair and each chromosome is of two strands that are identical (except where crossing over has occurred). Then the chromosomes separate into their single strands which move toward opposite ends of the dividing nucleus. The result of meiotic division is four cells, each haploid, with one chromosome of each pair.
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Check out "mitosis" in a suitable source (Wikipedia, for example).  The process is a bit long to describe here.
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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
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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.
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1. Nucleus\n2. Food Vacuole\n3. Contractile Vacuole\n4. Cytoplasm\n5. Psedopod\n6. Cell membrane
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There are two types of cells. Rod & cone cells. Rod cells are responsible for black & white vision, cone cells for color vision. at the yellow spot, there are only cone cells, at the other areas of the retina, there are rod cells. At the blind spot, there is neither.
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1 ribosomes\n2 stimuli\n3 enzyme\n4 cytoplasm
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Centrosomes. They function the same way as centrioles.
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It is called mitosis and the stage where you could see pairs of doublestranded chromos. would be in Prophase.
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Let's assume you want a human example.\nHuman cells have 46 chromosomes.\n\nIn Meiosis 1:\nProphase 1- chromosomes replicate, join with homologous pairs to become tetrads.\n--46 chromosomes paired, 23 tetrads, and 92 chromatids\nMetaphase 1- same numbers as prophase\nAnaphase 1: 46 chromosomes (double stranded), 92 chromatids\nTelophase 1: end: 23 chromosomes (double stranded), 46 chromatids per cell\n\nProphase 2: same as Telophase 1\nMetaphase 2: same as Telophase 1\nAnaphase 2: 46 chromosomes, zero chromatids\nTelophase 2: end: 23 chromosomes per cell.
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Tetrads are a pair of paired chromatids.  They form in Prophase I of meiosis and separate in Anaphase I of the same process.  If this did not happen here the final sperm or egg would have too many chromosomes in it.  This would cause a major problem for the organism reproducing, sine there would be a major possibility of no fertilization at all or a major bag of birth defects.
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Cell membrane, or phospholipid bi-layer.
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there are several, one is a vacuole. It is used to store soemthing usually food within the cell