How many human chromosome in each human somatic cell?
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a somatic cell is any cell of the body except germ cells.[sex cells].thus a normal somatic cell has 46 chromosomes in it.
409310
Assuming we're talking about humans ...\n\nIn the female gamete (the ovum, or egg cell) the DNA in the nucleus is contained in 23 chromosomes.  One of these is the sex chromosome, but this is always an X chromosome.  Outside the nucleus are additional pieces of DNA ... most notably, DNA in the mitochondria of the cell, which will get passed intact to the offspring.\n\nIn a male gamete (spermatozoan or sperm cell) the DNA in the nucleus is also contained in 23 chromosomes.  One of these is the sex chromosome and is either a Y or an X chromosome.  This will determine the gender of the offspring.  Sperm cells also have DNA in their mitochondria, but these are discarded upon fertilization (so the offspring gets mitochondrial DNA exclusively from the mother).\n\nUpon fertilization, the two gametes make a zygote.  The 23 chromosomes from each (haploid) gamete produces a complement of 46 total chromosomes in the (diploid) zygote.  The pair of sex chromosomes determines the gender of the developing offspring ... XY is a boy, XX is a girl.
79598
Both previous answers are inaccurate.\n\nMitosis is sometimes called growth division. In plants and animals new cells are made continually. Mitosis results in two new cells identical genetically to the original which divided.\nWe are diploid animals which have 23 pairs of chromosomes. After mitosis both cells still have 23 pairs of chromosomes.\n\nMeiosis is a division which produces sex cells (sperm or ova). After division is complete, each sex cell has half the number of chromosomes; it is haploid. So instead of having 23 pairs the sex cells will have 23 chromosomes - one of each type of chromosome.
761309
Homologous chromosomes are chromosomes in a biological cell that pair (synapse) during meiosis, or alternatively, non-identical chromosomes that contain information for the same biological features and contain the same genes at the same loci but possibly different genetic information, called alleles, at those genes. For example, two chromosomes may have genes encoding eye colour, but one may code for brown eyes, the other for blue.\n\nNon-homologous chromosomes representing all the biological features of an organism form a set, and the number of sets in a cell is called ploidy. In diploid organisms (most plants and animals), each homologous chromosome is inherited from a different parent. But polyploid organisms have more than two homologous chromosomes.\n\nHomologous chromosomes are similar in length, except for sex chromosomes in several taxa, where the X chromosome is considerably larger than the Y chromosome. These chromosomes share only small regions of homology.\n\nHumans have 22 pairs of homologous non-sex chromosomes (called autosomes). Each member of a pair is inherited from one of their two parents. In addition, female humans have a homologous pair of X sex chromosomes; males have an X and a Y chromosome.
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Try here\nhttp://www.genomesize.com/search.php\nThey have a good searchable database, see the column labeled "Ch" for chromosome diploid number.
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No, gametes are what starts a person's whole life cycle by fertilization. They consists of 23 chromosomes and a person needs 46 chromosomes
203875
Usually described as about 2 meters for all of the dna in one human cell.  This actually consists of many separate strands of dna.
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Aneuploidy is a condition in which the number of chromosomes is abnormal due to extra or missing chromosomes, in other words, it is a chromosomal state where the number of chromosomes is not a multiple of the haploid set. Normal diploid species have 2n chromosomes, where n is the number in the haploid set. Aneuploid individuals would have 2n-1 chromosomes (monosomy), 2n+1 chromosomes (trisomy), or some other such arrangement.\n\nA change in the number of chromosomes can lead to a chromosomal disorder. Aneuploidy is common in cancerous cells.\n\nMonosomy\nMonosomy is the presence of only one chromosome from a pair in a cell's nucleus. Partial monosomy occurs when only a portion of the chromosome has one copy, while the rest has two copies.\n\nHuman genetic disorders arising from monosomy are:\n\nX0-Only one X chromosome instead of the usual two (XX) seen in a normal female, also known as Turner syndrome \ncri du chat syndrome -- a partial monosomy caused by a deletion of the end of the short p (from the word petit, French for small) arm of chromosome 5 \n1p36 Deletion Syndrome -- a partial monosomy caused by a deletion at the end of the short p arm of chromosome 1 \n\nTrisomy\nA trisomy is the presence of three, instead of the normal two, chromosomes of a particular numbered type in an organism. Thus the presence of an extra chromosome 21 is called trisomy 21. Most trisomies, like most other abnormalities in chromosome number, result in distinctive birth defects. Many trisomies result in miscarriage or death at an early age.\n\nA partial trisomy occurs when part of an extra chromosome is attached to one of the other chromosomes, or if one of the chromosomes has two copies of part of its chromosome. A mosaic trisomy is a condition where extra chromosomal material exists in only some of the organism's cells.\n\nA trisomy can occur with any chromosome. Most trisomies result in spontaneous abortion; the most common types that survive to birth in humans are:\n\nTrisomy 21 (Down syndrome) \nTrisomy 18 (Edwards syndrome) \nTrisomy 13 (Patau syndrome) \nTrisomy 9 \nTrisomy 8 (Warkany syndrome 2) \nTrisomy 16 is the most common trisomy in humans, occurring in more than 1% of pregnancies. This condition, however, usually results in spontaneous miscarriage in the first trimester.\n\nTrisomy involving sex chromosomes in humans includes:\n\nXXX (Triple X syndrome) \nXXY (Klinefelter's syndrome) \nXYY (XYY syndrome) \n\nhope this helps
916206
Mitosis is a continuous process by which the body grows and dead body cells are replaced, in this type of cell division each "daughter cell " contains  the exact number of chromosomes as the "parent cell" 46 also called the diploid number. The process of mitosis  in sperm is called spermatogenesis  and in the ovum , called oogenesis.\nMeiosis is a different type of cell division where reproductive cells undergo 2 sequential divisions. During meiosis the number of chromosomes is reduced to half, 23 chromosomes also called the haploid number. At the moment of fertilization (when the sperm and ovum unite) the new cell contains 23 chromosomes from the sperm and 23 chromosomes from the ova returning to the diploid number of 46 and both the mothers and fathers traits are inherited by the gamete
30183
46 chromosomes per nucleus, with each chromosome being two individual DNA molecules, for 92 total--though immediately prior to mitosis and the dissolution of the nucleqr membrane, there will be twice that many DNA molecules.  And in the middle of the replication of that DNA, there will be hundreds of unlinked okazaki fragments.  Gamete cells can have less, depending on the stage of meiosis.  A complete gamete will have 23 chromosomes, or 46 DNA molecules.
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human cells contain 46 chromosomes\n\nthey go through a process of mitotic division that basically replicates each chromosome, the original and replicated chromosomes then migrate to opposite ends of the cells, and a cell membrane is formed, thus producing two progeny cells, division and the cycle of the cell is complete.\n\n\nmeotic division is a more complex process, but basically, the daughter cells contain 23 chromosomes, that is 1 of each pair of the 46 chromosomes is present in the daughter cell, where, whether it is a sperm or egg cell, when fused together, provide the fused cell with 46 chromosomes\n\n\n\n\nhope it helped you understand it a little better\n\nthere are however, different phases to the division process and if you like I can send you a link, depends on how much you want to know at present?
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Meiosis: -- One cell becomes 4 cells--There are 4 new "daughter" cells. Each new gamete cell contains only one-half of the number of chromosomes of the parent cell. Each sex cell goes through the division process twice in order to have the correct number of cells, and the correct chromosomal information.\n\nMitosis: -- One cell becomes two cells-- The new "daughter" cell has exactly the same number of chromosomes and information as the "parent" cell. 1 cell divides and becomes 2 cells.
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We normally have 23 pairs of chromosomes, that is, 46 chromosomes in total. When they're seen inside of a cell nucleus, they just look like similar V , X and Y shaped little dark spots, but the specialists are able to order them and know which ones belong to each pair (i.e. are homologous). They've labeled the pairs from 1 to 23 (the 23rd pair is the XX or XY sex chromosomes). \nIn Down syndrome, there is an extra chromosome. If you just looked at an image of the nucleus, you'd just count 47 chromosomes. But it has been determined that the "extra" one is a duplicate of one of the members of pair 21. \nIn the case of other duplicate chromosomes, the effects are not Down syndrome. Most cases of chromosomal duplication are lethal.
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Chromatids or sister chromatids.
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CHECK THE NUMBER OF CHROMOSOMES OF HUMAN, IT IS FIXED AT 48, BUT HUMAN WITH MORE OR LESS NUMBER OF CHROMSOMES TEND TO DEVELOPED OTHER PHYSICAL FEATURES THAT IS CONSIDERED ABNORMAL.OTHER ANIMALS HAVE THEIR NORMAL NUMBER OF CHROMOSOMES THAT INFLUENCED THEIR PHYSICAL FEATURES INCLUDING THE NUMBER OF FINGERS.
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Every human cell has 46 chromosomes. When reproducing, you cannot add all 46, otherwise your 46 plus your partner's 46 would = 92...twice the number of what it should be. SInce this is, during meiosis, the number is reduced from 46 chromosomes(23 pairs of 2) to 23 chromosomes, so you and your partner contribute and your child is normal.
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Trisomy is a form of aneuploidy where an organism has one extra chromosome in their genone (2n + 1). So a person with trisomy will have 47 chromosome (because a normal human has 46). A common example of trisomy is Down's Syndrome.\n\nThe n in 2n stands for the number of chromosomes in a haploid cell (a gamete, or 'sex cell') of that organism. So for humans it is 23 because a full set of chromosomes (2n) in a human is 46. It's more important to remember the 2n value of a species rather than the n value, which can easily be derived if you know 2n.\n\nMendel introduced the Law of Segregation and the Law of Independent Assortment using pea plants. Any half decent biology book can explain exactly what he did and how he derived these laws.\n\nCrossing over overs during metaphase of meiosis I (or metaphase I). More precisely, but probably not importantly, it actually occurs during prometaphase which is a phase between prophase and metaphase which was derived specifically to differentiate the process of crossing over from everything else which happens in metaphase. The teaching of prometaphase is inconsistent in courses so I would just stick with metaphase I for that answer.\n\nNondisjuction is when two chromosomes stay together instead of splitting up during anaphase, which results in the production of a cell with one extra chromosome and a cell with one less chromosome. This is the primary cause of Down's Syndrome which is related to maternal age, and other types of genetic diseases.\n\nMonosomy is the opposite to trisomy, that is, an organism has a genone with one less chromosome (2n - 1). It occurs just like trisomy. A human with monosomy will therefore have 45 chromosomes.