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.
Huntingtin (HTT) was the first disease-associated gene to be molecularly mapped to a human chromosome (Gusella et al. , 1983) . Ten years later, scientists identified the DNA sequence and determined the precise nature of the HD-associated mutation in HTT (MacDonald et al., 1993).hildren of a parent with HD have a 50% chance of receiving the mutated HTT gene and thus developing the disease later in life. Today, through the use of PCR-based techniques, individuals at risk for HD can view their genetic blueprint and see their certain future. Whether they do so is a personal choice.