Question

All the human races like Africans, Asians, Europeans, Americans and others might have evolved from a common ancestor. Which of the following are the evidences in support of this view?

• A. Common body plan of all in structure, physiology and metabolism
• B. Constant chromosome number of all and common genetic blueprint
• C. Free interbreeding
• D. All of the above

Answer 1

The correct option is D All of the above

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, that is, 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 species, Homo sapiens can be traced there. All these evidences clearly indicate that all of us whether Africans, Asians, Europeans or Americans, have evolved from a common ancestor.