Description
An individual's entire set of chromosomes is known as their karyotype. The term can also refer to an image created in a lab showing a person's chromosomes isolated from one cell and organized in numerical order. A karyotype can be used to check for chromosomal number or structural problems. For example, Down syndrome (also called trisomy 21) is detectable by looking at a person’s karyotype – with this specific syndrome, chromosome 21 is present three times, instead of two times.