Monosomy of the 23rd pair (XO) is know as? What are the Symptoms?
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Turner's Syndrome.  Short stature, slow growth, webbed neck, infertility, usually with no puberty, coarctation of the aorta, kidney problems leading to hypertension, osteoporosis.  The vast majority are well within normal in their mental abilities, like the rest of the population but some studies suggest a slightly higher percentage have some problems with visio-spacial orientation type things.\n\nIf they have no heart/great vessel abnormalities or kidney problems, they lead a normal life expectancy and are capable of anything any of the "breeders" are, except reproduction.
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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
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This happens on occasion. My sister was told that her second and third child was a girl and both ended up being boys (Yeah since it was the first boys in family in 40 years). The only absolutely 100% test is an Amnio centisis. That is when they tast the fluid of the sack to see which chromosomes are there. But relax it happens. I hope this is what you were asking.
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lol no\nits because it is a sex linked disease or disorder. there are the x and y sex chromosomes that determine gender the female is xx the male is xy. x is the only chromosome that can carry genes. colorblindness is recessive. let x1 stand for colorblind gene. if a female gets one colorblind gene (x1) having the genes x1x then they wont show colorblindness because it is recessive and wont show. if a male gets one color blind gene and has the genes x1y then he will have colorblindness because there is nothing else to cover it. males cannot be carriers and it is more likely for the males to get colorblindness because they only need one chance to get an x1 gene.
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Noonan Syndrome (NS) is a relatively common congenital genetic condition which affects both males and females. The principal features include congenital heart malformation, short stature, learning problems, indentation of the chest, impaired blood clotting, and a characteristic configuration of facial features.
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Nondisjunction.  \n\nNondisjunction occurs when homologous chromosomes fail to separate during meiosis.  This results in two cell with two copies of the chromosome (when it should one have one) and two cells with none (remember that meoisis produces four haploid cells).  If the cell with the extra copy fertilizes/is fertilized by a normal haploid gamete, the result will be a trisomy.  If a cell that's missing its copy of the chromosome combines with a normal haploid cell, there result is monosomy.\n\nThe other three choices (inversion, translocation, and crossing-over) involve changes in sequence, rather than chromosome structure or number.
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Yes, it is XYY and it is uncommon.  However, if you have this abnormality, you are unlikely to ever know it.  The tendency to violence with this abnormality is largely discredited, most evidence shows no abnormal tendencies in these people.  See the website below for more information and read the special chapter in the referenced book for an even more fascinating analysis of this question.\n\nEdit:\nI have looked into it a bit more and have found that the name of the condition is Jacobs Syndrome.  As to the question about whether it is possible, it certainly is possible.  It happens during meiosis II, when there is nondisjunction of sister chromatids of the Y chromosome, resulting in both sister chromatids in one cell and none in the other cell.  Nondisjunction means that the chromatids are normally supposed to split apart, one going into each cell, but that doesn't happen.
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No. B'coz if a perosn is heterozygous for a trait, the person will express the dominant trait. And, so will a person homozygous (dominant allele) for that trait. Therefore, it's not possible to differentiate between the two unless one obtains their karyotype chart.
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I am not sure.\nIf one X chromosome is de-activated normally perhaps the extra X chromosome in a polyploid individual is not.\nThe following link does not always open (!!!) - don't know why not. Also note it is PDF format.
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The X-chromosome in humans has about 1045 genes on it, and the Y only has 5. So the chances of a Y-linked disorder are slim (1/209). \n\nIn females, having two X chromosomes means that both would have to have the bad copy of the gene to express the trait. Males, with only one X, express whatever is on that chromosome, good or bad.
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having xxx sex chromosome.or a female with turner syndrome
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COLORBLIND WMEN ARE RARELY FIND. BUT IF SO HAPPEN THEN THE THIRD GENRATION WILL BE AFFECTED N NOT THEIR CHILDRN! AS WMEN HAV XX CHROMOSOMES N MEN HAV XY CHROMOSOME
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umm, though i'm not sure what the question really says- i think you are asking about genetic diseases involved with chromosome number, if i'm right the following stands, if not then ignore it. \nif you have less or more chromosomes than 46 you will not survive far past fertilization, at least thats what i understand- either that, or you would be a different species- unable to produce a fertile offspring with a human.\n\nHowever there is a lot of confusion around Down's syndrome. This is caused by non-disjunction of chromosomes during meiosis, and creates trisomy genotypes on chromosome 21. \n\nTrisomy and non-disjunction can also occur on chromosome 17- causing another disease, which i have momentarily forgotten the name of. sorry.
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chromosomal abnormalities?????hmmm....following types are the culprits:\nDisomy\n\nA disomy is the presence of a pair of chromosomes, or the normal amount for some organisms including humans. It is not a disorder, or aneuploid, but is the absence of aneuploidism.\n\n\nTrisomy\n\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. A mosaic trisomy is a condition where extra chromosomal material exists in only some of the organism's cells.\n\nWhile a trisomy can occur with any chromosome, few babies survive to birth with most trisomies. The most common types that survive without spontaneous abortion in humans are:\n\n    * Trisomy 21 (Down syndrome)\n    * Trisomy 18 (Edward's syndrome)\n    * Trisomy 13 (Patau syndrome)\n    * Trisomy 9\n    * Trisomy 8 (Warkany syndrome 2)\n\nTrisomy involving sex chromosomes includes:\n\n    * XXX (Triple X syndrome)\n    * XXY (Klinefelter's syndrome)\n    * XYY (XYY syndrome)\n\nDown syndrome (US, Canada and other countries) or Down's syndrome (UK and other countries) encompasses a number of chromosomal abnormalities, of which trisomy 21 (an aneuploid) is the most common, causing highly variable degrees of learning difficulties as well as physical disabilities. It is named after John Langdon Down, the British doctor who first described it in 1866.Trisomy 18 or Edwards Syndrome (named after John H. Edwards who first described the syndrome in 1960) is a genetic disorder. It is the second most common trisomy after Down's Syndrome. It is caused by the presence of three - instead of two - chromosomes 18 in a fetus or baby's cells.\n\neduard's syndrome......             The additional chromosome usually occurs before conception, when egg and sperm cells are made. A healthy egg or sperm cell contains 23 individual chromosomes - one to contribute to each of the 23 pairs of chromosomes needed to form a normal cell with 46 chromosomes. Numerical errors arise at either of the two meiotic divisions and cause the failure of segregation of a chromosome into the daughter cells (non-disjunction). This results in an extra chromosome making the haploid number 24 rather than 23. Fertilization of these eggs or sperm that contain an extra chromosome results in trisomy, or three copies of a chromosome rather than two. It is this extra genetic information that causes all the abnormalities characteristic of individuals with Edwards Syndrome. As each and every cell in their body contains extra information, the ability to grow and develop appropriately is delayed or impaired. This results in characteristic physical abnormalities such as low birth weight; a small, abnormally shaped head; small jaw; small mouth; low-set ears; and clenched fists with overlapping fingers. Babies with Edwards syndrome also have heart defects, and other organ malformations such that most systems of the body are affected.\n\nEdwards Syndrome also results in significant developmental delays. For this reason a full-term Edwards syndrome baby may well exhibit the breathing and feeding difficulties of a premature baby. Given the assistance offered to premature babies, some of these infants are able to overcome these initial difficulties, but eventually succumb.\n\nPatau syndrome, also known as trisomy 13, is a chromosomal aberration, a disease in which a patient has an additional chromosome 13.\n\nPatau syndrome is associated with severe mental retardation, small eyes that may exhibit a split in the iris (coloboma), a cleft lip and/or palate, weak muscle tone (hypotonia), an increased risk of heart defects, skeleta
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Karyotype\n,\n\n Karyogram of human male using Giemsa staining.A karyotype is a standardized arrangement of all the chromosomes of a cell. In normal diploid organisms, autosomal chromosomes are present in two identical copies, although polyploid cells have multiple copies of chromosomes and haploid cells have single copies. The chromosomes are arranged and displayed (often on a photo) in a standard format known as an idiogram: in pairs, ordered by size and position of centromere for chromosomes of the same size. Karyotypes are used to study chromosomal aberrations, and may be used to determine other macroscopically visible aspects of an individual's genotype, such as sex. In order to be able to see the chromosomes and determine their size and internal pattern, they are chemically labelled with a dye ("stained"). The pattern of individual chromosomes is called chromosome banding, whereas the study of whole sets of chromosomes is known as karyology.\n\nNormal human karyotypes contain 22 pairs of autosomal chromosomes and one pair of sex chromosomes. Normal karyotypes for women contain two X chromosomes and are denoted 46,XX; men have both an X and a Y chromosome denoted 46,XY. However, some individuals have other karyotypes with added or missing sex chromosomes, including 47,XYY, 47,XXY, 47,XXX and 45,X. The karyotype 45,Y does not occur, as an embryo without an X chromosome cannot survive.
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The children would have bloodtype A or bloodtype B.\n\nThe "O" which they get from one parent is merely an absence of the information necessary to have specific antibodies against other bloodtypes.
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Symptoms \n\nIndividuals with Down Syndrom may not experience all of the symtoms. Some of the common symptoms are: decreased muscle tone at birth, asymmetrical or odd-shaped skull, round head with flat area at the back of the head, small skull, slanting eyes, small mouth with protruding tongue (see tongue problems), broad short hands, single crease on the palm, retarded growth and development, delayed mental and social skills (mental retardation)\n\nWhat are the physical Characteristics?\n\nChildren with Down Syndrome have a widely recognized characteristic appearance. Their head may be smaller than normal (microcephaly) and abnormally shaped. Other prominent characteristics are: a flattened nose, protruding tongue, upward slanting eyes, short hands and fingers, and a single crease in the palm.