Report Abuse. In plants that undergo alternation of generations, a gametophyte is the structure, or phase of life, that contains only half of the total complement of chromosomes: The sporophyte produces spores, in a process called meiosis.
The life expectancy of cystic fibrosis patients has been increasing over the past 40 years. In the 1980s life expectancy of people with cystic fibrosis was 14 years. 10 years back, the life expectancy of a person with cystic fibrosis was around 18 years. Today it is 35 years. The median life expectancy of a newborn with cystic fibrosis has increased from 4 years to 32 years. It has been estimated that there has been more than 10 year increase in the average life expectancy of affected people in North America. Over 90% of the affected infants now survive beyond one year.
Cystic Fibrosis. Cystic fibrosis (CF) is a genetic disease usually characterized by lung problems, which limit the lifespan on average to 30 to 40 years. The body generates abnormally thick mucus, which clogs the pancreas (which helps to break up and absorb food) and the lungs.ymptoms Of A Child With Cystic Fibrosis. Many children with cystic fibrosis suffer from these symptoms: 1  Chronic lung disease, caused by continuing infections. 2  Pancreatic deficiencies. 3  Belly pain and distended abdomen.