Psychology researchers, however, tend to be interested in dimensions that are relatively less determined by genetics—traits that subject more to environmental influences, such as how a person feels, acts, and thinks. Given that the degree of genetic determination appears to vary from one dimension to another e. For example, Javier has two biological daughters who share the same biological mother. Both are tall, well mannered, and musically inclined.
Every individual on this earth is different from the other. No one person is fully like other person.
Every person differs from the other, either physically or psychologically. Even the twins are no exception to this. They differ in some aspects or other.
Particularly when we look at people from psychological point of view these differences are quite obvious.
In many instances even the children differ from their parents. They will have some similarities with some forefathers or grandparents instead of their parents. What makes these differences to exist?
What are the causes? The answer to these queries can be traced from two factors, viz. The basic sources of personality development are heredity and environment. Heredity refers to the genetic inheritance received by every individual at the time of conception.
The origin of every human life can be traced to a single cell called zygote. It is formed by the union of sperm and ovum. The sperm and ovum will contain 23 pairs of chromosomes out of which one will be sex determining chromosome.
Female will have 23 pairs of XX chromosomes. Male will have 22 pairs of XX and 2 single, represented as XY. X chromosome from mother and Y chromosome from father will lead to male offspring, XX from both parents give rise to female. In each chromosome there are innumerable genes.
These genes are the real determiners of hereditary characteristics—which pass on from one generation to the other. At the time of conception, the genes from chromosomes of both the father and the mother fuse together and determine the traits of the offspring to be born.Heredity directs the individual's potential, and environment determines whether and to what degree the individual reaches that potential The recent increase in type 2 .
The Influence of Heredity and Environment Today, researchers generally agree that heredity and environment have an interactive influence on intelligence.
Many researchers believe that there is a reaction range to IQ, which refers to the limits placed on IQ by heredity. The "nature vs.
nurture" debate still rages on, as scientist fight over how much of who we are is shaped by genes and how much by the environment.
The Nature Theory — Heredity Scientists have known for years that traits such as eye color and hair color are determined by specific genes encoded in . The history of the race and intelligence controversy concerns the historical development of a debate, or even if the dichotomy between environmental and genetic .
The storm of controversy that developed around Jenson’s claims was not mainly due to logical and empirical weaknesses in his argument. It was more to do with the social and political implications that are often drawn from research that claims to demonstrate natural inequalities between social groups.
Genetic & Environmental Influences on. Other articles where Heredity versus environment is discussed: human genetic disease: Cognitive and behavioral genetics: experiments to dissect the “nature versus nurture” aspects of human intelligence and behaviour have involved studies of twins, both monozygotic (identical) and dizygotic (fraternal).
Cognitive or behavioral characteristics that are entirely under genetic control would.