Search results
Results From The WOW.Com Content Network
tinman, or tin is an Nk2-homeobox containing transcription factor first isolated in Drosophila flies. The human homolog is the Nkx2-5 gene. tinman is expressed in the precardiac mesoderm and is responsible for the differentiation, proliferation, and specification of cardiac progenitor cells.
In biological taxonomy, race is an informal rank in the taxonomic hierarchy for which various definitions exist. Sometimes it is used to denote a level below that of subspecies, while at other times it is used as a synonym for subspecies. [1] It has been used as a higher rank than strain, with several strains making up one race.
Researchers have investigated the relationship between race and genetics as part of efforts to understand how biology may or may not contribute to human racial categorization. Today, the consensus among scientists is that race is a social construct , and that using it as a proxy for genetic differences among populations is misleading.
[5] [6] The division of humankind into biologically separate groups, along with the assignment of particular physical and mental characteristics to these groups through constructing and applying corresponding explanatory models, is referred to as racialism, racial realism, race realism, or race science by those who support these ideas.
The term race in biology is used with caution because it can be ambiguous. Generally, when it is used it is effectively a synonym of subspecies. [79] (For animals, the only taxonomic unit below the species level is usually the subspecies; [80] there are narrower infraspecific ranks in botany, and race does not
Human taxonomy is the classification of the human species within zoological taxonomy. The systematic genus, Homo, is designed to include both anatomically modern humans and extinct varieties of archaic humans.
A Troublesome Inheritance: Genes, Race and Human History is a 2014 book by Nicholas Wade, a British writer, journalist, and former science and health editor for The New York Times.
This rigid definition of race is no longer accepted by scientific communities. [ 1 ] [ 2 ] Instead, the concept of 'race' is viewed as a social construct . [ 3 ] This means, in simple terms, that it is a human invention and not a biological fact.