Prokaryotes.
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Answer:
In humans, genetic variations are caused because humans reproduce by a sexual life cycle which is termed as meiosis. In such a life cycle, the offspring receives half the chromosomes from the mother and half from the father. Crossing over and random assortment of chromosomes are two phenomenons which occur during meiosis. Due to these two phenomenons, genetic variations are caused.
During crossing over, the exchange of DNA segments between the homologous chromosomes takes place which brings about the genetic variations.
The smallest fragments travel the fastest because a smaller molecule has less resistance making it easier to travel through the gel.
The correct answer is 10
Hope this suites your question.
(btw sorry for the late answer)
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