Which of the following occurs in all species of living organisms and may lead to an increase in genetic variation?

(A) Mutations in the genome
(B) Crossing-over in meiosis
(C) Random assortment of chromosomes
(D) Alternative splicing of mRNA


Answer: (A) Mutations in the genome

Biology & Microbiology

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In eukaryotic cells, we sometimes find reverse transcriptase activity, even though the cells are not infected with a retrovirus. This activity can be attributed to

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