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Like many other medical conditions, obesity is the result of an interplay between environmental and genetic factors. [2] [3] Studies have identified variants in several genes that may contribute to weight gain and body fat distribution, although only in a few cases are genes the primary cause of obesity.
16p11.2 deletion syndrome is a rare genetic condition caused by microdeletion on the short arm of chromosome 16. Most affected individuals experience global developmental delay and intellectual disability, as well as childhood-onset obesity. [1] 16p11.2 deletion is estimated to account for approximately 1% of autism spectrum disorder cases. [3] [4]
The idea has been proposed by geneticist Dean Hamer in the 2004 book called The God Gene: How Faith is Hardwired into our Genes. The God gene hypothesis is based on a combination of behavioral genetic, neurobiological and psychological studies. [2]
MORM syndrome is an autosomal recessive congenital disorder [1] characterized by mental retardation, truncal obesity, retinal dystrophy, and micropenis". [1] The disorder shares similar characteristics with Bardet–Biedl syndrome and Cohen syndrome, both of which are autosomal recessive genetic disorders.
Pathophysiology of obesity is the study of disordered physiological processes that cause, result from, or are otherwise associated with obesity. A number of possible pathophysiological mechanisms have been identified which may contribute in the development and maintenance of obesity.
In a normal situation, all the cells in an individual will have 46 chromosomes, with one being an X and one a Y or with two Xs. However, sometimes during the early copying processes of DNA replication and cell division, one chromosome can be lost. In 45,X/46,XY, most or all of the Y chromosome is lost in one of the newly created cells.
Many “failed” obesity interventions are, in fact, successful eat-healthier-and-exercise-more interventions. A review of 44 international studies found that school-based activity programs didn’t affect kids’ weight, but improved their athletic ability, tripled the amount of time they spent exercising and reduced their daily TV ...
Chromosome 16 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. People normally have two copies of this chromosome. Chromosome 16 spans about 90 million base pairs (the building material of DNA) and represents just under 3% of the total DNA in cells .