ningbo dating service - Drosophila fly article dating before 1950

Genetic processes work in combination with an organism's environment and experiences to influence development and behavior, often referred to as nature versus nurture.

drosophila fly article dating before 1950-26

James Watson and Francis Crick determined the structure of DNA in 1953, using the X-ray crystallography work of Rosalind Franklin and Maurice Wilkins that indicated DNA has a helical structure (i.e., shaped like a corkscrew).

This structure showed that genetic information exists in the sequence of nucleotides on each strand of DNA.

Blending of traits in the progeny is now explained by the action of multiple genes with quantitative effects.

Another theory that had some support at that time was the inheritance of acquired characteristics: the belief that individuals inherit traits strengthened by their parents.

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).

A classic example is two seeds of genetically identical corn, one placed in a temperate climate and one in an arid climate.

While the average height of the two corn stalks may be genetically determined to be equal, the one in the arid climate only grows to half the height of the one in the temperate climate due to lack of water and nutrients in its environment.

The structure also suggested a simple method for replication: if the strands are separated, new partner strands can be reconstructed for each based on the sequence of the old strand.

This property is what gives DNA its semi-conservative nature where one strand of new DNA is from an original parent strand.

It is generally considered a field of biology, but intersects frequently with many other life sciences and is strongly linked with the study of information systems.

Tags: , ,