DNA stores information that is needed for passing down our genetic characteristics from one generation to the next â for example, what we look like and how we develop â hence it is also known as our genetic blueprint. Half of each person's DNA comes from their mother and the other half from their father. Back to Top.
Small Area Variations. Definition. Health Economics. A term usually applied to the observed wide variations in clinical practices within jurisdictions having otherwise similar health care organizational structures and payments systems, and having populations with similar demographic, economic, social and epidemiological characteristics.
Variation is high when there are many different alleles of all genes and when there are many different combinations of those alleles. However, genetic variation is constantly changing. Different alleles of a single gene can appear and disappear from time to time within a group.ecombination (Crossing Over). This is the exchange of genetic material between adjacent chromatids on the homologous chromosomes. This random exchange of DNA results in many new combinations of alleles on chromosomes, creating great potential for variation.