Question

Transposons are movable elements of DNA that insert into new positions within the genome. A transposon may disrupt normal gene function, confer an evolutionary advantage, or have no effect on the organism.
Select all scenarios in which a transposon has positively contributed to the evolution of the host's genome.
a. insertion of a transposon encoding a heat shock protein into the genome of a plant
b. insertion of a transposon into the gene encoding for dystrophin, a protein involved in skeletal movement and cardiac function
c. aquisition of a transposon carrying an adhesin gene into the Lactobacillus casei genome
d. acquisition of a transposon that disrupts
e. an enhancer element of a colorectal cancer tumor‑suppressor gene acquisition of a transposon carrying a tetracycline resistance gene in a bacterium

Answer 1

Answer: Transposons are genomic sequences that can cause or reverse mutations by changing its positions.

Explanation:

a., and c. are the correct options.

The heat shock protein encoded by the transposon will increase the thermotolerance of the transgenic plant. It will also improve it's stress tolerance.

The adhesin genes will enable the bacteria to stick on the walls of the intestinal tract of humans and this will help human body in digestion process.