Mobile Elements and Genome Evolution

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Questions and Answers

What term is used to describe mobile elements as 'genomic parasites' or 'drivers' of genomic evolution?

  • DNA recombination
  • Chromosomal reattachment
  • Genomic resharpening
  • Molecular Drive (correct)

Which scientist discovered the DNA transposons (transposons) known as 'jumping genes'?

  • James Watson
  • Barbara McClintock (correct)
  • Francis Crick
  • Rosalind Franklin

What mechanism is initiated by the 'cut and paste' mechanisms of Tn elements to repair 'scars' due to mobility?

  • Loss of genetic material
  • Epigenetic modification
  • Gene duplication
  • Recombination by recombinases (correct)

What term describes the short repeated sequences that are usually found adjacent to mobile elements when they integrate into the genome?

<p>Target site duplication (C)</p> Signup and view all the answers

Which of the following is a significant genomic contribution of mobile elements?

<p>Creation of recombination hot spots (A)</p> Signup and view all the answers

In the context of mobile elements, what does 'accidental speciation' refer to?

<p>Development of a new species due to mobile element activity (B)</p> Signup and view all the answers

Which of the following is a source of new genes in macroevolution?

<p>Mobile elements (A)</p> Signup and view all the answers

What is the primary mechanism responsible for the movement of mobile elements in DNA?

<p>Transposition (C)</p> Signup and view all the answers

What is the term for the process in which a new gene is introduced into a population through the action of a mobile element?

<p>Horizontal gene transfer (D)</p> Signup and view all the answers

Which of the following is a consequence of mobile element movement in macroevolution?

<p>Increased genetic diversity (B)</p> Signup and view all the answers

Which of the following mechanisms is most directly involved in the spread of mobile elements within a population?

<p>Gene flow (C)</p> Signup and view all the answers

What percentage of the human genome consists of LTR retroelements?

<p>8% (B)</p> Signup and view all the answers

What is the primary mechanism of mobility for Class 1 mobile elements?

<p>RNA-mediated transposition through reverse transcriptase (A)</p> Signup and view all the answers

What is the name of the small, renegade RNA genes that make up around 13% of the human genome?

<p>SINES (A)</p> Signup and view all the answers

What is the approximate percentage of the human genome that consists of mobile elements?

<p>30% (D)</p> Signup and view all the answers

What is the enzyme responsible for converting RNA to DNA in retrotransposition?

<p>Reverse transcriptase (C)</p> Signup and view all the answers

What is the term for autonomous and non-autonomous mobile elements?

<p>Class 1 and Class 2 mobile elements (C)</p> Signup and view all the answers

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