How to use X-chromosome in a sentence
The only true male calicos will typically have an extra X chromosome.
The researchers studied the gene for the androgen receptor, which is located on the 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.Advertisement
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.Advertisement
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.Advertisement
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.Advertisement
A female's normal X chromosome may compensate for her chromosome with the fragile X gene mutation.
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.Advertisement
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.
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.
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.
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.
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.