Two people with similar looks are called Doppelgänger or Lookalike. Such people have no biological relationship, yet they have so much in common that anyone who looks at them will think they are twins.
There are about 600 crore people in the world. The appearance of each person depends on the DNA, genes, chromosomes inherited from their parents. Each human body has 23 pairs of chromosomes. Each chromosome pair comes with one chromosome from both mother and father. Each pair of chromosomes exchanges parts of themselves to form new chromosomes. For this genetic crossing over human appearance, behavioral differences are observed. So, there is no chance of another person in the world having exactly the same appearance.
Although there are many similarities between doppelgangers, it is easy to distinguish between them. Scientists blame global migration in the past for Doppelganger's similarities. In other words, there are some similarities between the DNA of everyone in a nation or group. Scientists have calculated that there are 6 people in the world who look the same.
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