Olfactory degradation and Visual evolution synchronization

People know that the human senses such as hearing or vision, when one of the shortcomings in time, the other will become more sensitive to such changes in one's life is always present. In fact, humans throughout evolution process, similar changes or adjustments have also always been interruption. Scientists in Germany and Israel, through the test found in primates, olfactory perception gene (OR) of missing and full vision-get some links exist between, say, their sense of smell degradation and Visual evolution is synchronous.

Smell taste gene is the smell of the molecular basis of primates, including humans and animals, mice have the same number of olfactory perception gene. The human sense of smell and feel gene in 60 per cent do not have active, these genes are also called pseudogene, tailless monkeys in this proportion pseudogene is 30 per cent, the mice to 20 per cent. In order to study whether this false genes in all primates genetically identical proportion in occupies, and its evolution in time, scientists investigated include people, 19 species of primates and found that in Europe, the monkey and the tailless monkeys and sense of smell and feel the same proportion pseudogene; and in the Americas, in addition to roar monkeys, this proportion is much smaller.

These results show that European monkeys, apes and roared without tail monkey smell in the evolution of a recession, respectively. Although they do not have a common ancestor, but they have a common sense features — color vision. The complete Visual needs three apparent protein absorption of different wavelengths of light, and then in the middle to form the full color image. Tailless apes and monkeys in Europe have all three depending on the protein gene, while the majority of American monkeys but only has two genes. This can be seen, the evolution of color vision in primates in twice, once in tailless monkeys and European common ancestor monkey, approximately 2300 years ago; another occurs at Monkey, about 700 000 to 1600 years ago. Researchers believe that this vision of evolution and the smell of degradation occur during the same period, when the animal's nose degradation, in order to survive, their auditory or Visual is more developed.