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4. What is DNA fingerprinting and explain how this could be used in court or on a TV show such as CSI?
5. List the four large molecules of life.” Identify their composition and structure, and describe one function they perform
6. What is meant by the terms dominant and recessive alleles?
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Answer #1

DNA is present in every organism that is why DNA is called genetic material. DNA stores all information about an individual.

Every organism has a unique DNA. In humans, everyone is having a unique DNA and just like fingerprints are unique is fir a person, no two persons have the same DNA ( except twins)

So, in DNA fingerprinting DNA sequence is isolated and variable elements are identified in DNA. Everyone is having a unique pattern of minisatellite.

In this technique, DNA from cell is extracted and then is cut with the help of restriction endonuclease. DNA fragments are obtained from varying lengths. These fragments are placed in gel for gel electrophoresis. the fragments are separated on the basis of size, the smallest fragments move the fastest. The DNA fragments are transferred for southern blotting Then hybridization radioactive probe is done. Then DNA is compared with patterns of known subjects.

This helps in finding the culprits and help police and detective to catch the criminal.

Please give a thumbs up!!!!!!!! Ask any doubts regarding the above question in the comment section !!!!!!!!!!! Thank you!!!!!

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