Not all inherited
elements or combinations are present at birth
In any complex
human trait, there is a combination of many separate traits that results in capacities or abilities. Thus, musical ability should be thought of not as a
single characteristic, but as a complex made up of a number of more elementary
abilities, such as sensitivity to small difference in pitch, a rhythm, and
ability to remember musical intervals. In a sense of a particular child
sensitivity to pitch might come from the mother, a sense of rhythm from the
father, the ability to remember tonal intervals from the maternal grandmother,
and so on, thus producing a child who has potentiality for music. If anyone
were absent, the child could not dependent not go so far in music The
possibilities of human adjustment are thus dependent not only upon the Specific
characteristics inherited but also upon their combination or pattern.
So far as human
heredity is concerned, to a very large degree, the capacities used in adjusting
to Ife situation depend on combinations of elements rather than the Specific
elements. A boy may have very quickly in reaction time, but if he is also very
clumsy, Speed of reaction alone will be of little value to him in baseball. If,
however, he is quick in reaction and in motor control, a fine baseball. If,
however, he is quick in reaction and good in motor control, a fine baseball
player may be in the making. Think of the inherited equipment of the human
being as composed of literally thousands equipments, which in their combination
and pattern make possible a tremendous variety of adjustments.
Not all inherited
elements or combinations are present at birth, as many people suppose. Much of
the behavior present at birth is in heisted, since only the limited environment
of the fetus has been operating. However, may inherit characteristics do not
reveal themselves until sometime well after birth, when the environment is
opportune or when development has reached an appropriate level. For instance,
one of the phenomena most clearly demonstrated to be controlled by heredity is
the character and distribution of hair. The color of the beard, its curliness
or straightness, as well as its pattern of distribution on the face is
controlled by hereditary factors .But the beard of the male does not begin to
appear until puberty and is not complete for several years after puberty.
By the shuffling
and reshuffling of chromosomes and genes, nature sees to it that each person
born is a unique combination of the traits and characteristics that have come
down to him through his ancestral lines .Each person both resembles and differs
from each of his parents and each of his grandparents, in important and minor
aspect .His brothers and sisters, in turn, are like him in some respects and
different from him in others.
This unique
person moves into an environment which provides him with an opportunity for
exhibiting and developing his qualities. The manner in which the culture or
environment operates to provide similar experiences and contents for him has
been stressed in earlier chapters .Here we will stress another side of the
picture – we will point out in addition that first, the environment selects
individuals and thus increases rather than decreases uniqueness; and, second
that the individual selects from the environment in accordance with his own
make –up and thus increases rather than decreases uniqueness.
The first point
is frequently misunderstood. Suppose one hundred boys are given careful
instruction in running over a period of three months and have the same amounts
of practice .Will they be more alike or more different than they were before?
The answer is not a categorical <<alike >> or a categorical
‘’different “but ‘’both’’.