function in. 1  chromosomal disorders (in chromosomal disorder) 2  crop production (in Poaceae: Economic and ecological importance) 3  fern evolution (in fern: Chromosome numbers and polyploidy) 4  speciation (in evolution: Polyploidy)
The American Medical Association (AMA), founded in 1847 and incorporated in 1897, is the largest association of physiciansâboth MDs and DOs âand medical students in the United States.
In addition to its advocacy work, the AMA also publishes a collection of peer-reviewed medical journals, most notably the Journal of the American Medical Association, which has been in publication since 1883 and is the most circulated medical journal in the world.