Growing degree-day. Growing degree days (GDD), also called growing degree units (GDUs), are a heuristic tool in phenology. GDD are a measure of heat accumulation used by horticulturists, gardeners, and farmers to predict plant and animal development rates such as the date that a flower will bloom, an insect will emerge from dormancy, or a crop will reach maturity.
Cystic fibrosis is a genetic condition caused by a faulty gene (known as the CFTR gene). The CFTR gene normally creates a protein that moves salt and water out of a cell.If the CFTR gene is defective, it results in a build-up of thick, sticky mucus in the body's tubes and passageways.ystic fibrosis is a genetic condition caused by a faulty gene (known as the CFTR gene). The CFTR gene normally creates a protein that moves salt and water out of a cell.
Cystic fibrosis: Cystic fibrosis (CF) is an autosomal recessive disorder that is the most common lethal genetic disease among Caucasians, with an incidence of about 1 in 3200 newborns in the U.S. CF is caused by mutation of the gene encoding the cystic fibrosis transmembrane conductance regulator (CFTR).espite this persistent and exuberant inflammatory response, P. aeruginosa infection persists in the CF airway, in part due to a series of adaptive bacterial changes that are not yet well defined. Adaptation of P. aeruginosa to the airway is important for cystic fibrosis lung disease.