report that this discrimination, called genetic imprinting
(SN: 5/2089, p.
Studies have shown that trap-and-haul fish have lower rates of genetic imprinting
, important in finding spawning grounds, according to the letter.
Recent discoveries related to genetic expression have led to the development of the new scientific field of epigenetics, which involves genetic imprinting and gene silencing.
It is now widely believed that genetic imprinting and gene silencing are mediated through the histones.
Scientists don't know how much of the human genome is under the influence of genetic imprinting
, says Nicholls, now at the University of Florida College of Medicine at Gainesville.
It also may clarify aspects of another mysterious phenomenon, known as genetic imprinting, in which identical genes behave differently depending upon the gender of the contributing parent (SN: 5/20/89, p.
These influences have their roots in the phenomenon of genetic imprinting.
Researchers became increasingly convinced that genetic imprinting
accounts for a variety of unusual inheritance patterns (135: 312) and identified the first genetic disease clearly linked to the phenomenon (136: 324).
Moreover, geneticists examining the syndromes' molecular bases say Prader-Willi now appears to be the first concrete example in humans of a poorly understood genetic phenomenon called genetic imprinting, as well as the best evidence yet linking imprinting to human disease (SN: 5/20/89, p.
Scientists have suspected that genetic imprinting -- a difference in gene expression dependent upon which parent contributed that gene -- might play a critical role in fetal and adult development, and may account for the unusual inheritance patterns of some diseases.