Dna and biology short homework ( 2 hours )

A robbery takes place at the ATM on Campbell Avenue. A passerby who witnessed the robbery was shot. Unfortunately, the security cameras cannot pick up the face of the individual that committed the crime. The camera can identify that the robber left a cigarette butt on the keypad of the machine. There is no evidence of anyone else visiting the ATM between the time the theft occurred and the crime was reported. The camera clearly shows that the suspect left in a service van belonging to a company that provides emergency HVAC repairs. As soon as the crimes are reported and connected, the police collects evidence, including fingerprints on the lock of the machine and the cigarette butt. They also call the HVAC company to find out who was on call around the area where the theft and shooting occurred. The police learns that there were three individuals on call that night servicing the area within 10 miles of the ATM machine. The investigators proceed to obtain DNA from mouth swabs of the three suspects and subject it to short tandem repeat (STR) analysis by comparing it to the DNA isolated from the cigarette butt left at the scene. They use this evidence to determine who committed the crime.

You recall that each person carries two copies of 23 chromosomes (for a total of 46 chromosomes); one copy comes from the mother and the other copy from the father. Each of the 23 chromosomes contains a unique set of genes that code for protein (coding DNA), but a significant portion of DNA contains repetitive sequences that do not code for protein (non-coding DNA). Scientists have figured out that there are certain areas of the genome that contain repetitive sequences that occur in tandem, and the number of times these are repeated vary between individuals. This information can be used to create an individual’s DNA profile or DNA fingerprint. Figure 1 (below) shows specific regions of human chromosomes where the FBI looks for these repetitive sequences (STRs). These regions are called CODIS sites (COmbined DNA Index System).

Figure 2 (below) shows an example of a CODIS region obtained from the DNA isolated from the cigarette’s butt at the crime scene.

You will use this information and visual aids provided to answer the questions on the attached worksheet. When comparing the STRs on CODIS, take into account that as depicted above, the first column corresponds to the sequence of nucleotides on the chromosome inherited from the father and the second column corresponds to the STR sequence inherited from the mother. This extra credit assignment is worth 15 points.


, here are the instructions please check before committing to answer the question my time to submit it is ver limited please be aware of everything and make sure you fully understand it and 100% positive of the answer before picking this question

You can leave a response, or trackback from your own site.


9 Responses to “Dna and biology short homework ( 2 hours )”

  1. 823753 298794To your organization online business owner, releasing an important company is the bread so butter inside of their opportunity, and choosing a fantastic child care company often means the particular between a victorious operation this really is. how to start a daycare 886211

  2. Sexy video says:

    12376 588889I adore meeting utile info, this post has got me even more information! . 288214

  3. 385533 264616This will likely be a terrific web site, may well you be interested in performing an interview about how you developed it? If so e-mail me! 906974

  4. 150800 396458Attractive part of content. I just stumbled upon your site and in accession capital to claim that I acquire in fact enjoyed account your weblog posts. Any way Ill be subscribing to your feeds and even I achievement you get entry to constantly speedily. 783113

  5. 583551 15875This design is spectacular! You naturally know how to keep a reader amused. Between your wit and your videos, I was almost moved to start my own weblog (nicely, almostHaHa!) Fantastic job. I really enjoyed what you had to say, and more than that, how you presented it. Too cool! 128411

  6. CICD says:

    989026 164745Aw, it was a really good post. In concept I should put in writing similar to this moreover – spending time and actual effort to manufacture a superb article but exactly what do I say I procrastinate alot and no indicates discover a method to go carried out. 576643

  7. 585315 66296Howdy! I just want to give an enormous thumbs up for the wonderful info you may have here on this post. I will likely be coming back to your weblog for a lot more soon. 260595

  8. euroclub says:

    480519 61214hello i discovered your post and thought it was very informational likewise i suggest this web site about repairing lap tops Click Here 762256

  9. 727654 857376Some truly nice stuff on this web web site , I like it. 576625

Leave a Reply

Powered by WordPress | Designed by: buy backlinks | Thanks to webdesign berlin, House Plans and voucher codes