Dolphins produce a variety of vocalizations, usually in the form of clicks and whistles. Dolphins are sometimes hunted in places like Japan, in an activity known as dolphin drive hunting. Besides drive hunting, they also face threats from bycatch, habitat loss, and marine pollution.
The DNA sequence of a gene can be altered in a number of ways. Gene mutations have varying effects on health, depending on where they occur and whether they alter the function of essential proteins. The types of mutations include:his type of mutation is a change in one DNA base pair that results in the substitution of one amino acid for another in the protein made by a gene.
Diseases that are caused by a change in a single gene can be inherited in one of several ways, including: 1  Autosomal dominant: This means the condition is caused by a genetic change in just one copy of the gene.his change is called a mutation. Such changes in the genetic sequence can. 1  Inactivate the gene and result in a loss of function, 2  Cause the gene to create abnormal forms of the normal protein or. 3  Result in increased production of the normal protein.