Overaeration lungs: Hyperaeration means lungs contain larger amount of air than normally expected. Has many causes. In children can be seen with diseases causing air trapping such as bronchiolitis, asthma, cystic fibrosis, congenital heart disease, early aspiration, and metabolic acidosis.
Barbara McClintock's World Discovering Jumping Genes For the first half of the 20th century, genes were seen as objects with fixed positions on the chromosomes. However, in the 1950s, Barbara McClintock showed that certain DNA fragments, termed transposons, can be activated to jump from one position on a chromosome to another.
Alu is an example of a so-called jumping gene a transposable DNA sequence that reproduces by copying itself and inserting into new chromosome locations. Alu is classified as a retroposon, because it is thought to require the retrovirus enzyme reverse transcriptase (rt) enzyme to make a mobile copy of itself.f one reduces the definition of life to the perpetuation and amplification of a DNA sequence through time, then Alu is an extremely successful life form. However, other scientists believe that transposable elements have played an important role in evolution by creating new mutations and gene combinations.