Add to favorite
 
123
Subscribe to our Newsletters Subscribe to our Newsletters Get Daily Updates RSS


Natural And Acquired Behaviour: What Scientists Say
July 7, 2006 17:52


The issue of natural and acquired aspects of behaviour is traditionally considered to be one of the most interesting in behavioural studies, aimed at finding hereditary patterns of human and animal behaviour. Scientists tend to think that most primitive animals have more natural behaviour, while higher animals are guided by learning or cultural inheritance.

Once world of biologists was divided into two parts one part considered all character and behaviour ingredients to be predetermined, the other claimed character to originate from learning and no natural components, responsible for behaviour and character, could be pointed out, because there was always some environmental influence. As experimental biology advanced, current epigenetic theory formed. This theory suggests existence of a genotype, which genes are affected by an environment, thus an organism is formed as a result of a combination of the genotype and the environment.

Environmental effect is often a necessary condition for the next stage of organisms development. It affects both brain development and general behaviour. Various animal species have various degree of dependence on environmental factors. Many experiments show complex character of this dependence.

Russian biologists studied natural behavioral patterns of two lines of mice. Mice of first line had bigger brain compared to body weight. They turned out to have better abilities for learning. This ability was proved in experiments. Mice with smaller brain appeared to be very shy, which can also suppress their ability for learning.

Mice with big brain were placed in two types of cages standard ones and comfortable ones. They showed better cognitive abilities in comfortable cages, while mice with smaller brains showed no difference in abilities. The studies showed that staying in comfortable cages activates production of new neurons in special generative brain areas.

Humans always wanted to know what aspects of their behaviour are genetically predetermined. Such studies are performed within genetics of human behaviour psychogenetics, which uses standard methods of genetics, such as ancestry analysis and expression of certain character patterns in generations. We all know remarkable examples of musical talents in the Bach family or the Bernoulli family, which gave the world several generations of brilliant mathematicians.

Twin studies are also successfully used in examining many complex human characteristics. Twins are natural experiment, which allows studying people, which are identical in their genotype. They are called monoval twins, or identical twins. If scientists have many twins at their disposal, they are able to check how similar their reactions to various events, answers to psychologists questions, or electrophysiological reactions are. The same technique is used for finding similarities of diovular twins, which developed from different eggs and differ as brother and sisters do. But their development conditions are more alike than that of brothers of different age. And it turns out that many temper characteristics, emotional reactions, reactivity and some specific intellectual abilities have significant genetic component.

Thus, psychogenetics allows making interesting conclusions in pedagogy and in human cognition of himself.

Anna Kizilova, 7 July 2006

Source:

    www.svobodanews.ru


Tags:      

Next Previous

You might also find interesting:

Charging Gadgets In The Woods Russian Scientists to Create Universe in Vitro Some Facts About Stem Cells Nearest Future of Russian Power Engineering Global Warming Makes Islands Vanish in the Arctic Ocean









Comment on our site


RSS   twitter   facebook   submit

Bookmark and Share

search on the map
TAGS:
Volkhov  Visa card  Russian art  St. Petersburg  Dmitri Shorin  Russian business  visas  Festivals in Moscow  environment  Doll Exhibition  Russian Theater  Enrique Iglesias  Russian children  buy Russian designers  Mercedes-Benz Fashion Week Russia  Russian tourism  Russian regions  Vladimir Lenin (Ulyanov)  terrorism  Hermitage  Anton Chekhov  International space station  Ukraine crisis  March 8  Russian tourists  FSB  Alexey Navalny  Russian cinema actors  economic crisis  the Altai   Jubilee  Moscow  "Ballet of Moscow" Theatre  Exhibitions in Moscow  Winzavod  Orthodoxy  Concerts in Moscow  Moon Rovers  Russian places of interest  travel to Russia  Tatarstan  Russian customs  Boris Khlebnikov  Nikolay Krymov  North Caucasus  Primorsky Territory  Yugra  Kuban   Russian authorities  Russian Cinema 


Travel Blogs
Top Traveling Sites