If the daughter organisms do not differ from the parental organisms, then this is a sign of asexual reproduction. With asexual reproduction, DNA from the parent organism is transferred to the daughter one. There are no different DNA changes. This is true not only for bacteria and protists. Asexual reproduction is characteristic of many plants, fungi and animals. Sexual reproduction mixes the genetic material of the two organisms. The offspring has unique DNA. Therefore, during sexual reproduction, mutations occur more often.
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