This is called a monohybrid experiment. A test cross is performed between two plants that breed true for one trait, and the resulting trait for each offspring plant is determined The first, true-breeding generation, is called the parent, P generation.
Lumbar Degenerative Disc Disease Video. The natural history of lumbar degenerative disc disease is relatively benign. The pain tends to be intermittent, and although at times the pain may seem to be getting worse, the painful symptoms are generally not progressive. While the disc degeneration will progress, the low back pain and other symptoms do not tend to get worse with the progression of the degeneration.
Degenerative neck condition fundamentals. Degenerative neck conditions affect the cervical vertebrae â the seven vertebrae that form the upper part of your spine, between your skull and chest.When one or more of these bones is broken, the injury is called a cervical fracture.he level and type of neurological impairment are related to the location of the neck damage, which is described in terms of the nearest vertebra. A second major cause of degenerative neck conditions is cervical arthritis. This condition causes the cartilage in joints to wear away either due to an accident or age.