Every somatic cell contains 46 chromosomes that carry the genetic instructions for life. These chromosomes are part of the DNA in cells that contain genes. However, when there is a change in the number or structure of chromosomes, chromosomal disorders can occur. These disorders affect a person’s development, health, and physical appearance.
Having a chromosomal disorder means having fewer or more chromosomes than what is considered normal. Some chromosomes may be missing altogether. Signs and symptoms may include birth defects, intellectual disabilities, growth delays, weak muscle tone, and issues with coordination and balance. It’s important to note that some chromosomal disorders may not have any symptoms at all.
It’s important to recognize that chromosomal disorders aren’t caused by just one specific issue. They can result from a variety of factors. The most common one is a nondisjunction, and this is when chromosomes fail to separate during cell division. Another common one is translocation, which is when a piece of a chromosome breaks off and attaches to another chromosome. The rarer instances are deletion, duplication, and inversion. Deletion is when a segment of a chromosome is missing. Duplication, as the name suggests, is when a piece of a chromosome is duplicated. Inversion is one of the rarest chromosomal disorders. For every 100,000 people, only 10-50 have an inversion mutation. Inversions occur when a segment of a chromosome breaks off and reattaches in a reversed orientation. Some chromosomal disorders are hereditary, meaning they can be passed down from parents to offspring.
There are a variety of treatments that depend on the severity and type of chromosomal disorder, and symptoms an individual experiences. Treatment options include physical therapy, speech therapy, medications, and surgery to correct physical abnormalities.
Common chromosomal disorders include Down syndrome, Klinefelter syndrome, and Fragile X syndrome. Down syndrome affects 1 in every 691 babies born in the United States. Individuals with Down syndrome have a defect in chromosome 21. Behavioral concerns in people with Down syndrome have included non-compliance and elopement.
Klinefelter syndrome is when an individual has an extra X chromosome present in the sex chromosomes, which only affects males. A normal male karyotype is XY. With Klinefelter’s syndrome that now is XXY. This can lead to infertility, learning disabilities, and affects physical and cognitive development.
Fragile X Syndrome is one of the most well known causes for inherited intellectual disability. The affected gene is the X chromosome as the name suggests. While both males and females can be diagnosed, males are often more severely affected than females. People with Fragile X syndrome can be diagnosed with autism in some cases. They tend to avoid social interaction and can be a little more aggressive (hand-biting/flipping, engaging in problem-behavior to avoid social interactions, etc.)
A lot of chromosomal disorders are often stigmatized, and in some cases can be undermined or treated as less-than. While they do have cognitive impairments, it’s important to note that they are human beings too, and it would be wrong and immoral to treat them as any less. People with chromosomal disorders, with the right treatment, help, and support, can accomplish just as much, if not more than any normal person.
Chromosomal disorders occur due to a multitude of reasons, which can impact a person’s development, health, cognitive ability and more. Conditions such as Down syndrome, Klinefelter syndrome, and Fragile X syndrome help us understand how these disorders can affect everyday life. However, with the right treatment, care, and support, individuals with chromosomal disorders can live meaningful, successful lives. Understanding chromosomal disorders helps reduce stigma, induce empathy, and spread awareness.