What are TEs Comment on Are there any distinctive features W

What are TEs? Comment on Are there any distinctive features Why might biologists want to study what do you know different kinds associated with TEs? What are TES? about transposable What types of organisms contain these? elements (TEs) in TEs? general? Vague (1); OK (1.5); Good (3) Vague (1), OK (1.5), Good (3) Vague (1): OK (1.5); Good (3 How might P-elements have How do P-elements move around Why are Pelements important for entered Drosophila melanogaster? the genome? Connect your ideas biologists and Drosophila What do you know What do you know about P-element to the special P-elements used in researchers in particular? about P-elements structure? How big are the native this lab. What is the connection What do you know about the Gene in Drosophila? elements? between transposition of mobile Disruption Project (GDP) in DNA elements and DNA Drosophila? replication? Vague (1): OK (1.5): Good (3 Vague (1): OK (2): Good (4 Vague (1): OK (2): Good (4

Solution

1.Transposable elements or transposons are defined as the DNA sequence that are able to move from one location to the other in the genome.They were first discovered by Barbara McClintock in maize and are also called as the \"jumping genes\".

Transposons are found in almost all organisms starting from bacteria to higher organisms i.e from prokaryote to eukaryotes and are known to have played a significant role in evolution.

There are two major types of transposons .they are:

Class I transposons and Class II transposons

Class I transposons are called as retrotransposons as they first transcribe the DNA into RNA and then use the enzyme reverse transcriptase to make a copy of the DNA from RNA and insert it in a new location.

Class II operate by \"Cut and Paste\" mechanism and contain DNA that moves directly from place to place.They are cut at their location and are inserted into a new location.Distinctive features of transposons;

1.One of the most defining property of a transposon is its mobility.

2.They are diverse in nature some move by DNA intermediates (class I) while some move by RNA intermediates(ClassII)

3.Due to their ability to rearrangement they play a significant role in evolution.

4.some transposons activate or inactivate the genes depending on their position of insertion.egEnhancement of oncogeneic activity.

Transposons cause deletions and inversions.