(April 2014) In law and government, de jure (/deÉª ËdÊÊrÉª/; Latin: de iure, in law) describes practices that are legally recognized by official laws. In contrast, de facto (in fact or in practice) describes situations that are generally known to exist in reality, even if not legally authorized.
Only a portion of them are chromosome abnormalities. Single gene disorders are conditions that are caused by a change in a single gene. Because there are thousands of genes, there are thousands of single gene disorders. This group of disorders cannot be diagnosed by a karyotype.
In addition to Down syndrome (trisomy 21), a karyotype can determine if you have: 1  Edward syndrome (trisomy 18) 2  Patau syndrome (trisomy 13) 3  Turner syndrome (one X) 4  Klinefelter syndrome (XXY) 5  XYY syndrome. 6  Triple X syndrome (XXX)