mutation

Mutation, the process of changing hexachords in medieval music theory. Mutation (organ stop), a type of organ stop that does not sound at unison or octave pitch.

In the terminology of linguistics, mutation is a change in a vowel sound caused by a sound in the following syllable. I-mutation is a change in the sound of a vowel so that it is pronounced with the tongue higher and further forward.

This process of transferring to an overlapping hexachord at the pivotal points is called mutation. It enabled the singer to apply the solmization syllables to any series of notes he encountered, although he would take musical context into consideration in choosing the best note on which to mutate.

In music, a hexachord (also hexachordon) is a six-note series, as exhibited in a scale (hexatonic or hexad) or tone row. The term was adopted in this sense during the Middle Ages and adapted in the 20th century in Milton Babbitt's serial theory.

For example, the disorder sickle cell anaemia is caused by a mutation in the gene that instructs the building of a protein called haemoglobin. This causes the red blood cells to become an abnormal, rigid, sickle shape. However, in African populations, having this mutation also protects against malaria.

The result of a mutation, a change in the DNA sequence. The effects of mutations can vary widely, from being beneficial, to having no effect, to having lethal consequences, and every possibility in between.

(A) A mutation is a small-scale change in the nucleotide sequence of a DNA molecule. A point mutation is shown but there are several other types of mutation, as described in the text. (B) DNA repair corrects mutations (more...) Both mutation and recombination can have dramatic effects on the cell in which they occur.

Sarcomere gene mutations are the primary genetic cause of hypertrophic cardiomyopathy (HCM). However, a large number of patients with HCM do not have sarcomere gene mutations and it remains poorly defined why these patients develop asymmetric myocardial hypertrophy.

In music theory, a tetrachord (Greek: τετράχορδoν; Latin: tetrachordum) is a series of four notes separated by three intervals. In traditional music theory, a tetrachord always spanned the interval of a perfect fourth, a 4:3 frequency proportion (approx.

A kindred example is d-b-c[#]-d-c[#]-d-d, which might be sung in the hard hexachord as sol-mi-fa-sol-fa-sol-sol with the semitone b-c and whole-tone c-d "mentally" altered to a whole-tone and semitone respectively; "or a mutation will be made of mi into re," placing us properly in the ficta hexachord of A-F# with c[#]- ...

Types of Changes in DNA

Mutations can be of many types, such as substitution, deletion, insertion, and translocation.