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.
Keywords: one gene-one enzyme. George W. Beadle's One Gene-One Enzyme Hypothesis. The one geneâone enzyme hypothesis, proposed by George Wells Beadle in the US in 1941, is the theory that each gene directly produces a single enzyme, which consequently affects an individual step in a metabolic pathway.