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.
McClintockâs maize studies concerned jumping genes that get cut out of the genome and pasted elsewhere. But these âDNA transposonsâ seem to be inactive in humans, Dubnau says. His study focused instead on a type of jumping gene that is active in people.n a study published last year, his group showed that jumping genes normally bind to TDP-43, a protein that has been linked to frontotemporal dementia and Lou Gehrigâs disease. In postmortem brain tissue from people who had frontotemporal dementia, however, the transposons do not bind to TDP-43.