What would happen if I had an extra chromosome?
A change in the number of chromosomes can cause problems with growth, development, and function of the body’s systems. These changes can occur during the formation of reproductive cells (eggs and sperm), in early fetal development, or in any cell after birth.
Why does having an extra chromosome cause problems?
When a chromosome is abnormal, it can cause health problems in the body. Abnormal chromosomes most often happen as a result of an error during cell division. Chromosome abnormalities often happen due to one or more of these: Errors during dividing of sex cells (meiosis)
Can aneuploidy be beneficial?
How is aneuploidy beneficial? As with the detrimental consequences of aneuploidy, most of the growth-advantageous properties of aneuploidy likely result from changes in gene copy number. In particular, many benefits of aneuploidy can apparently be explained by the change in copy number of one or a few genes.
What diseases are caused by an extra chromosome?
A trisomy is a chromosomal condition characterised by an additional chromosome. A person with a trisomy has 47 chromosomes instead of 46. Down syndrome, Edward syndrome and Patau syndrome are the most common forms of trisomy.
What happens if a baby has an extra chromosome?
A medical term for having an extra copy of a chromosome is ‘trisomy. ‘ Down syndrome is also referred to as Trisomy 21. This extra copy changes how the baby’s body and brain develop, which can cause both mental and physical challenges for the baby.
Why are individuals with an extra chromosome 21 which causes Down syndrome more numerous?
Translocation trisomy 21.
In this type of chromosomal change, only part of an extra copy of chromosome 21 is in the cells. The extra part of the chromosome gets “stuck” to another chromosome and gets transmitted into other cells as the cells divide. This type of change causes a small number of Down syndrome cases.