DNA analysis can be used to identify a person, because no two people have the same what?

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Under the soviet system, the government a. controlled all forms of communication. b. allowed newspapers to print whatever they wanted. c. controlled editorials but not the reporting of news. d. encouraged access to a wide variety of news sources. select the best answer from the choices provided a b c d

Plz ! what does it mean for an allele to be dominant?