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Although genes were known to exist on chromosomes, chromosomes are composed of both protein and DNA, and scientists did not know which of the two is responsible for inheritance.In 1928, Frederick Griffith discovered the phenomenon of transformation (see Griffith's experiment): dead bacteria could transfer genetic material to "transform" other still-living bacteria.
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Genetic processes work in combination with an organism's environment and experiences to influence development and behavior, often referred to as nature versus nurture.
The intracellular or extracellular environment of a cell or organism may switch gene transcription on or off.
Genetics has given rise to a number of subfields, including epigenetics and population genetics.
Organisms studied within the broad field span the domains of life (archaea, bacteria, and eukarya).
In his third law, he developed the basic principles of mutation (he can be considered a forerunner of Hugo de Vries).
Other theories of inheritance preceded Mendel's work.
Prior to Mendel, Imre Festetics, a Hungarian noble, who lived in Kőszeg before Mendel, was the first who used the word "genetics." He described several rules of genetic inheritance in his work The genetic law of the Nature (Die genetische Gesätze der Natur, 1819).
His second law is the same as what Mendel published.
This term, still used today, is a somewhat ambiguous definition of what is referred to as a gene.Tags: Adult Dating, affair dating, sex dating