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.
Correction: A previous version of this story incorrectly stated that the lifespan of cystic fibrosis patients is will increase 75 percent by 2015. Although the average survival age is rising, it has been revised to read that the number of adults living with cystic fibrosis will increase 75 percent by 2015. Comment.efore 1960, an infant born with cystic fibrosis was not expected to live more than a few months. Today, thanks to advances in treatment and care, these same babies are surviving well into their late 30s. A recent study now predicts that those currently living with cystic fibrosis may live far longer.