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x-chromosome

x-chromosome

x-chromosome Sentence Examples

  • centromere map of the X chromosome from trisomies of maternal origin.

  • gene on the X-chromosome.

  • The researchers studied the gene for the androgen receptor, which is located on the X-chromosome.

  • The researchers studied the gene for the androgen receptor, which is located on the X-chromosome.

  • The only true male calicos will typically have an extra X chromosome.

  • In CMTX, the CMT-causing gene is located on the X chromosome and is called connexin 32 (Cx32).

  • A female child inherits two X chromosomes, while a male child inherits an X chromosome from one parent and a Y chromosome from the other.

  • In X-linked EDS, a specific gene on the X chromosome must be changed.

  • However, because males only have one X-chromosome, they are affected if an X-linked recessive EDS gene is changed on their single X-chromosome.

  • If a father with an X-linked recessive form of EDS passes a copy of his X chromosome to his children, the sons will be unaffected and the daughters will be carriers.

  • There is also a type of ocular albinism that is carried on the X chromosome and occurs almost exclusively in males because they have only one X chromosome and, therefore, no other gene for the trait to override the defective one.

  • Turner syndrome-A chromosome abnormality characterized by short stature and ovarian failure caused by an absent X chromosome.

  • This condition has an X-linked, recessive pattern of inheritance, meaning that the defective gene is carried on the X chromosome.

  • A female who carries a defective recessive gene on one of her two X chromosomes will not have the disease because she also has one good X chromosome.

  • Menkes disease-A genetic disease caused by a mutation on the X chromosome and resulting in impaired transport of copper from the digestive tract.

  • A male child inherits an X chromosome from his mother and a Y chromosome from his father.

  • He will have the disorder if the X chromosome inherited from his mother carries the defective gene, since he has only one (nonfunctioning) copy of the gene.

  • Females inherit one X chromosome from their mother and a second X chromosome from their father.

  • Because they have two X chromosomes, they are carriers of the disorder if one of their X chromosomes has the gene that causes the condition, while the other X chromosome does not.

  • All individuals with Hunter syndrome are male, because the gene that causes the condition is located on their single X chromosome.

  • Fragile X syndrome-A genetic condition related to the X chromosome that affects mental, physical, and sensory development.

  • Fragile X syndrome is caused by a mutation in the FMR-1 gene, located on the X chromosome.

  • This greater inclination occurs because males have only one copy of the X chromosome.

  • A female's normal X chromosome may compensate for her chromosome with the fragile X gene mutation.

  • FMR-1 gene-A gene found on the X chromosome.

  • The more common of the two, known as X-linked hyper-IgM syndrome (XHIM), is caused by an abnormal gene on the X chromosome and affects only boys.

  • Hyper-IgM syndrome is caused by a mutation in a gene on the X chromosome that affects the patient's T cells.

  • Turner syndrome is a birth defect caused by the absence of an X chromosome in some or all cells of a female, which inhibits sexual development and usually causes infertility.

  • The missing chromosome is an X chromosome.

  • About 1 to 2 percent of all female conceptions have a missing X chromosome.

  • However, it is estimated that 3 to 8 percent of girls with a single X chromosome and 12 to 21 percent of females with sex chromosome mosaicism may have normal pubertal development and spontaneous menstrual periods.

  • The primary cause of osteoporosis may be inadequate levels of estrogen circulating in the body; however, defects in bone structure or strength may also be related to the loss of unknown X-chromosome genes.

  • This specific learning problem is referred to as Turner neurocognitive phenotype and appears to be due to loss of X chromosome genes important for selected aspects of nervous system development.

  • While the X chromosome carries many genes, the Y chromosome carries almost none.

  • Hemophilia A and B are both caused by a genetic defect present on the X chromosome.

  • Because a female child always receives two X chromosomes, she will nearly always receive at least one normal X chromosome.

  • People with this condition are born with at least one extra X chromosome.

  • The extra chromosome is an X chromosome.

  • Approximately 1/3 of all males with Klinefelter syndrome have other chromosome changes involving an extra X chromosome.

  • Mosaic Klinefelter syndrome occurs when some of the cells in the body have an extra X chromosome and the other have normal male chromosomes.

  • Diagnosis of Klinefelter syndrome is confirmed by examining chromosomes for evidence of more than one X chromosome present in a male.

  • Fragile X syndrome-A genetic condition related to the X chromosome that affects mental, physical, and sensory development.

  • It is seen only in males because it is caused by a genetic defect on the X chromosome.

  • Females can have the defective gene, but since they have two X chromosomes, there will be a normal gene on the other X chromosome to counter it.

  • The most common form of SCID is X-linked, i.e. the defect is on the X chromosome and, therefore, occurs only in boys.

  • Turner syndrome-A chromosome abnormality characterized by short stature and ovarian failure caused by an absent X chromosome.

  • Although persons with XLA carry the genes to produce immunoglobulins, a genetic defect on the X chromosome prevents their formation.

  • The gene that controls the production of Btk is on the X chromosome.

  • Boys only have one copy of the gene, because they only have one X chromosome.

  • To make a definitive diagnosis, the child's X chromosome is analyzed for defects in the Btk gene.

  • Turner's syndrome is a genetic disorder caused by a missing X chromosome that occurs only in females.

  • Turner syndrome-A chromosome abnormality characterized by short stature and ovarian failure caused by an absent X chromosome.

  • The gene responsible for WAS is located on the short arm of the X chromosome.

  • Since males have only one X chromosome they only have one copy of the gene.

  • The normal copy on one X chromosome is usually sufficient to prevent females from having WAS.

  • Researchers identified the gene for WAS in 1994 and pinpointed its location on the short arm of the X chromosome.

  • This indicates that the X chromosome is one of the locations for color blindness.

  • Maternal DNA or mitochondrial DNA, is contained on the X chromosome.

  • Depending on which direction it is spun in, the X chromosome sperm rises to the top of the test tube.

  • Since the egg has no gender, it's the sperm's job to combine either a Y or X chromosome with egg's X chromosome to produce a boy (XY) or a girl (XX).

  • Fragile X syndrome involves chromosomal problems on the X chromosome.

  • FXS is caused by a mutation in a gene on the X chromosome that interferes with the production of a protein needed for proper brain development.

  • Male children who inherit a fully mutated version of the FMR1 gene in the X chromosome will develop Fragile X, since males have just one X chromosome.

  • Female children, on the other hand, have two copies of the X chromosome, which often leaves them one normal X chromosome to fall back on to produce that essential protein, allowing proper development to occur.

  • Mothers who have one mutated X chromosome and one normal copy have a 50 percent chance of passing the mutation to each child they bear, though they are very likely to show no symptoms of fragile X themselves.

  • Taking the latter first, Fragile X Syndrome is a genetic disorder carried by the X chromosome (the female one).

  • The name itself comes from the fact that it is caused by an overly replicating protein sequence in the X-chromosome of a child.

  • For girls, with two X-chromosomes, the odds are that the "normal" X chromosome will compensate for the "fragile" one.

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