False: A carrier for a disease like cystic fibrosis has an increased likelihood of developing the disease later in life.
Cystic fibrosis is an inherited disorder that damages the lungs, digestive system, and other organs in the body. Digestive juices, sweat, and mucus are produced by the bodily cells and are thin to facilitate easy flow. But the genes of a CF-affected person convert these secretions into thick liquids.
The thick liquids then trigger the abnormal functioning of the organs like the lungs, pancreas, etc. A person, with a copy of defected CF genes, is known to be a carrier of CF. They, themselves, do not have the disease but can transfer it to the offspring. A child will have CF if it receives one copy of CF affected gene from both of its parents.
Since cystic fibrosis is a genetic disease that can affect the child with homologous pairs of the affected gene. A carrier for CF cannot have cystic fibrosis later in life. He can only affect his offspring.
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