Question

Who determines whether the two organism of a species will be exactly similar or not?

Answer 1

Whether two organisms of a species will be exactly similar or not is determined by their genetic material (DNA). During reproduction, DNA carries hereditary information from parents to offspring. If the DNA is copied accurately, as in most cases of asexual reproduction, the offspring are nearly identical to the parent. In sexual reproduction, the mixing of DNA from two parents creates variations, making the offspring genetically different. Thus, the inheritance and combination of DNA determine the similarities and differences between organisms.