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Humans are created and DNA is inherently passed on to us from our parents. In relation to genes we have a gene each passed onto us from each parent. In total DNA will formulate but will it transpire to affect our behavioural traits, or the environment we are brought up in nurture our behaviours away from our genetic make up?

The Jim twins are famous, a case study for behavioural traits we inherit in our DNA, separated at birth and then reconciled at the age of thirty nine years of age. Both twins discovered much interest in the same hobbies, also they had been married twice each to woman of the same name. This was a classic case of substantiated familiarity which both had a common ground with.

Twins which are identical but with somewhat difference in stature during infancy and childhood, it has been shown the larger of twins have an abundance of nutrients compared to it's counterpart within the womb. Twins Eric and Cory who are identical have been studied extensively, both of whom had a great difference in stature, and the bigger twin had a far better IQ. The smaller of the twins (Cory) went on to develop in stature and catch up to his brother, eventually in turn equally his IQ score.

In sport the genetics athletes have allow them to be gifted, the nurtured environment also produces the key results to allow athletes the talents they have to come to fruition. The human frame we all possess will to a degree predict the abilities we have, are we short and stocky, if so, we would be good at sports such as rugby or powerlifting. If we are tall with elongated limbs we will be perhaps suited to running, maybe strength based sports would be out of the equation, perhaps others have a better gene pool, and even with nurturing we might not abide as successfully as you would hope.

In comparative to evidence, diagnostic disease and conditions are prone to us, the nature of inherited genes will predispose some to disease more so then others. In particular when we inherit diseases, we either have one or two parents who are gene carriers.

It goes without saying disease can be inherent such as Huntington's Disease whereby one parent who contains the gene and during the conception of a child risks the child at 50% risk of developing the gene which predisposes the condition. When one parent contains a gene this is known as a Dominant gene. 

Recessive disorders are inherited when both parents contain a gene. Conditions such as Cystic Fibrosis were the symptomatic build up of mucus within the breathing tract develops in something of a terminal condition, common in Caucasian population at a rate of 1 in every 2,500 children developing the disorder.


Bindon, J. R. and Baker, P. T. (1997) ‘Bergmann’s rule and the thrifty genotype’, American Journal of Physical Anthropology, vol. 104, no. 2, pp. 201–10.

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