Question

Which of the following is NOT a way in which transposable elements are thought to contribute to evolution?

a. They can facilitate recombination between chromosomes. b. They can insert into a protein-coding sequence and change its expression. c. They can cause duplications of entire chromosomes. d. They can carry entire genes with them to a new position in the genome. e. They take individual exons with them during transposition.
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Answer 1

The ways by which transosable elements are thought to contribute in evolution are as follows:

• Homologous transposable elements scattered throughout the genome provide sites where recombination can occur between different chromosomes.
• Movement of these elements into coding or regulatory sequences may change expression of genes.
• Transposable elements also can carry genes with them leading to dispersion of genes and in some cases different patterns if expression. or transport of an exon during transposition and its insertion into a gene may add a new functional domain to the originally encoded protein a type of exon shuffling.

The correct answer is option C.