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 (CF) is an autosomal recessive disorder caused by mutations in the CFTR gene, and some forms are known to cause pancreatitis. Symptoms of hereditary pancreatitis may begin as early as childhood and may present as an isolated symptom or as part of a rare genetic syndrome. Hereditary pancreatitis can be inherited in a number of ways, depending on the gene(s) involved. One common cause of hereditary pancreatitis involves mutations in the PRSS1 gene.1,3 PRSS1 codes for an enzyme called cationic trypsinogen, which aids in digestion.