A dysfunctional Eustachian tube that is always open is called a patulous Eustachian tube. Patients with this rare condition are plagued by chronic ear infections. A much more common problem is a failure of the Eustachian tube to effectively regulate air pressure.
A frameshift mutation (also called a framing error or a reading frame shift) is a genetic mutation caused by indels (insertions or deletions) of a number of nucleotides in a DNA sequence that is not divisible by three.he frameshift mutation will also alter the first stop codon (UAA, UGA or UAG) encountered in the sequence. The polypeptide being created could be abnormally short or abnormally long, and will most likely not be functional.
â¢ The frame of the DNA strand is shifted one way or the other in a frameshift mutation, whereas point mutations do not change the frame of the DNA strand. â¢ The gene structure and the number of nucleotides are changed in frameshift mutations while point mutations cause only the structure of a gene. â¢ Frameshift mutations are of two types, but point mutations are of few types. Related posts: 1  Difference Between Manure and Organic Matter.