What is a chromosome disorder?
Chromosome disorder is an abnormality that leads when the embryo develops either with too many or too small chromosomes. A normal human being has 46 chromosomes. Each of them contributes to eggs and sperm 23 chromosomes when they combine and form an embryo. Eggs or sperm will sometimes contain an incorrect number of chromosomes. When this happens, the child is born with a chromosome disorder.
Sometimes the embryo will have the right number of chromosomes, but one of the chromosomes will contain abnormality. The piece may be missing, reverse, duplicated or switched by another chromosome. If this happens, the person will have a structural chromosome disorder.
usually the fetus with chromosomal disorder does not survive and the woman has an abortion. It is estimated that more than half of the abortions that occur during the first trimester are caused by a chromosome disorder in the embryo. When birth occurs, the child is often born with congenital defects.
The syndrome is one of the most common chromosome disorders. Children born with Down Syndrome OBThey have significant facial features and have learning disabilities that differ in severity. Many of these children also have heart defects and other physical problems. Older women have an increased risk of childbirth with Down syndrome or other chromosome disorder. This risk increases with age, so tests often recommend to determine whether the fetus is normal when an older woman becomes pregnant.
Turner syndrome is a chromosomal disorder that affects only girls. A normal girl has two X chromosomes. Turner's syndrome leads when a girl has only one X chromosome and the other X chromosome is damaged or missing. Girls with this disorder are usually not fertile and are unable to go through puberty without medical intervention.
Triple X is another cporuch of a bommer that only affects girls. Females with this disorder have another X chromosome. They are often high and have no apparent physical or mental defects. Parents of a girl born withThis chromosome disorder may not even know that their daughter is unless prenatal testing is performed.
Some chromosome disorders affect only boys. One of them is called xyy. A normal man has two Y chromosomes, while a boy with xyy has other Y chromosomes. These individuals show normal development and their parents may not know that their son has a chromosome disorder if it does not appear during prenatal testing.