Answer:
There
is no biological basis to the notion of human races. All humans are a single
species irrespective of their race. All of them have a common body plan,
structure, physiology and metabolism. All of them have a constant chromosome
number, i.e., 46, their genetic makeup is also similar, almost 99.9% DNA is
same in all humans. And also all the humans, can freely inter-breed to produce
offsprings.
Not only this, study of evolution of human beings indicates that all of
us come from Africa.
The earliest members of the human qspecies, Homo sapiens
can be traced there.
All these evidences clearly indicates that all of us
whether Africans, Asians Europeans orAmericans, etc; have evolved from a common
ancestor.
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