Thursday, September 1, 2011
Chromosome Excess, Can Make The Body Thin
In general, a person inherits the same gene composition of the parents. But in some people with certain gene could have duplicated that number to 2 times more than normal people.
Research by scientists from the University of Lausanne in Switzerland and Imperial College London in England revealed that the composition of the gene numbered 16 or so-called gene-16 can affect to weight. Peope who have gen duplication about to stay thin although eating a lot of food.
Conversely, in people who lose some of the genes, their weight will be easier to increase despite the same diet with others. As a result, despite diet, the body tends to look fat.
Research involving 95,000 people, the work revealed that the gene duplication or multiplication of the 16 experienced by 1 in 2,000 people worldwide. In men, this condition increases the risk of underweight by 23-fold and 5-fold in women.
Underweight or very underweight defined by body mass index (BMI) below 18.5 kg/m2. The opposite of underweight is overweight if the BMI is in the range 25-29 kg/m2 or obese if the BMI has exceeded 30 kg/m2.
Besides increasing the risk of underweight, which makes the composition of gene duplication-16 too much too risky trigger microcephalus or shape of the head is too small. Because small head, brain volume is limited so susceptible to nerve damage and the average life expectancy is shorter.