what is the blood group of negroid racial group
Answers
Answer:
RH+ or RH-
Explanation:
Since the 1920s, Franz Boas and his school of anthropology at Columbia University were criticising the concept of race as politically dangerous and scientifically useless because of its vague definition.[22]:248

Illustrations of "racial types" from The New Student's Reference Work (1914), edited by Chandler B. Beach and Frank Morton McMurry
In 1950, UNESCO published their statement The Race Question. It condemned all forms of racism, naming "the doctrine of inequality of men and races"[23]:1 among the causes of World War II and proposing to replace the term "race" with "ethnic groups" because "serious errors ... are habitually committed when the term “race” is used in popular parlance".[23]
Carleton Coon
American anthropologist Carleton S. Coon published his much debated[22]:248 Origin of Races in 1962. Coon divided the species Homo sapiens into five groups: Besides the Caucasoid, Mongoloid, and Australoid races, he posited two races among the indigenous populations of sub-Saharan Africa: the Capoid race in the south, and the Congoid race.[24] In 1982, he used Negroid and Congoid as synonyms.[25]
Coon's thesis was that Homo erectus had already been divided into five different races or subspecies. "Homo Erectus then evolved into Homo Sapiens not once but five times, as each subspecies, living in its own territory, passed a critical threshold from a more brutal to a more sapient state."[26] He thought that the Caucasoid race had passed the threshold to Homo sapiens about 200,000 years earlier than the Negroid race,[22]:248 thus giving segregationists in the southern US the opportunity to make political use of his thesis in their fight against the civil rights movement.[22]:249 Although Coon publicly assumed a neutral stance regarding segregation, some fellow anthropologists accused him of being racist because of his "clear insensitivity to social issues".[22]:249 In private conversations and correspondence with his cousin Carleton Putnam, a prominent supporter of white supremacy, he went much further, helping Putnam "hone his arguments against integration".[22]:256
Coon's evolutionary approach was criticized on the basis that such sorting criteria generally do not produce meaningful results, and that evolutionary divergence was extremely improbable over the given time-frames.[27] Monatagu (1963) argued that Coon's theory on the speciation of Congoids and other Homo sapiens was unlikely because the transmutation of one species to another was a markedly gradual process.[28]
Since Coon followed the traditional methods of physical anthropology, relying on morphological characteristics, and not on the emerging genetics to classify humans, the debate over Origin of Races has been "viewed as the last gasp of an outdated scientific methodology that was soon to be supplanted."[22]:249