Representing the two planets, two iron-copper metals and the gods atop Olympus, the classic symbols of Male and Female gender carry a lot of meaning deep inside the scribbles.
The symbols themselves are ancient and the associations help back to the dawn of civilization. The ancients, after observing the motions of the planets in the solar system, had predictions about future events and believed that those events were connected by relationships. Cause and Effect. Later, ancient scholars began to conduct more logical research to accurately predict and prepare for the future. They also link the planets with the power of protection gods like Mercury, Venus, Mars, Zeus (Jupiter) and god Cronus (Saturn).
Each celestial body in heaven, along with the guardian god associated with special metal elements. For example, the sun god Helios is attached to a metal especially gold ( Note: according to the spectrum in human vision, the Sun is actually white, not gold ); Mars god ( Thourus Greek ) is combined with iron used to make weapons; or god Venus ( Greek Phosphorus ) attached to softer metal, copper can turn green.
When writing about these metals, the Greeks introduced them by the names of the gods - characters associated with the letters, after some time, a type of shorthand was formed; eg Mars (Thourus) and Venus (Phosphorus):
In the Middle Ages, European alchemists relied on abbreviated notations to be elucidated and used as celebrities Carolus Linnaeus (" father" of Modern Classification and creator). The popular Binary language ), indicates the corresponding metals contained in his Systema Naturae study in 1735.
Linnaeus was also the first person to use these characters in the biological context of the Plantae Hybridae thesis in 1751, when he used the symbol Venus to represent the Female and the Mars symbol representing Men . Later, Linnaeus continued to use the symbols for purposes to distinguish Male and Female sexes and by " Species Plantarum " in 1753, he used free symbols.
Following Linnaeus, other botanists began using symbols, as well as scientists from other fields including zoology, biology, humanity and finally geneticists.
Currently, modern genetics no longer uses familiar symbols anymore and instead, gender is expressed based on a square for men and circles for women:
These symbols were developed by Pliny Earle - a neurologist in New York in 1845 while explaining the inheritance of color blindness:
For sự xác thực của các việc xác định các tổng hợp này, khi có sự kiện này có thể, I đã thể tạo một phụ đề của genealogical chart. Males are represented by squares and females by circles.
For the purpose of clearly illustrating this physiological rate specificity in families, I have prepared additional genealogy charts. Men are represented by squares and women are circles.
While it is unclear why Earle did not choose classical symbols, the Royal Society member later gave an explanation - Mr. Edward Nettleship declared that Earle had " been unable to use signs." This classic self on the printer . except for those who work in music printing ".
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