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.
Modern genetic technology can be used to modify the genomes of living organisms. This process is also known as âgenetic engineering.â Genes of one species can be modified, or genes can be transplanted from one species to another. Genetic engineering is made possible by recombinant DNA technology.Organisms that have altered genomes are known as transgenic.Most transgenic organisms are generated in the laboratory for research purposes. For example, âknock-outâ mice are transgenic mice that have a particular gene of interest disabled.odern genetic technology can be used to modify the genomes of living organisms. This process is also known as âgenetic engineering.â Genes of one species can be modified, or genes can be transplanted from one species to another. Genetic engineering is made possible by recombinant DNA technology.