(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.
Guide. Karyotype is a test to identify and evaluate the size, shape, and number of chromosomes in a sample of body cells.Extra or missing chromosomes, or abnormal positions of chromosome pieces, can cause problems with a person's growth, development, and body functions. Find out whether a chromosome defect is present in a fetus. 2  Karyotyping also may be done to find out whether chromosomal problems may have caused a fetus to be stillborn. 3  Find out the cause of a baby's birth defects or disability.