Question

A number of passengers were severely burnt beyond recognition during a train accident name and describe a modern technique that can help hand over the dead to their relatives.

Answer 1

Hint It is a method used to identify living things based on samples of their DNA. These techniques look at the presence or absence of common markers that can be quickly and easily identified, instead of looking at the whole sequence of a person’s DNA

Complete answer:
The majority of human DNA is encapsulated in the nuclei and is called the genomic DNA. Genomic DNA consists of four bases namely adenine, thymine, guanine, and cytosine.
 In the United States in 1990 the “Human Genome Project,” was started in an attempt to decode the whole genomic DNA sequence. The entire sequence was determined in 2003. Human genomic DNA is composed of 3 billion base pairs, and about 0.1% of the sequence differs among individuals.
These genomic sequence differences with a frequency in the population of 1% or more are called “polymorphisms” and are distinguished from “mutations” with a frequency of 1% or less. The sequence used for individual identification is “polymorphism”.
DNA polymorphism is widely being used for individual identification in criminal investigations and for blood relationship identification which is termed as “Short Tandem Repeat” or STR. STR is a repetitive sequence polymorphism which is also called a microsatellite.

Additional information:
Seven steps to understanding DNA fingerprinting are as follows:
-Extracting the DNA from the cells
-Cutting up the DNA using restriction enzyme
-Separating the DNA fragments on a gel
-Transferring the DNA onto blotting paper
-Adding the radioactive probe
-Setting up the X-ray film
-Yes - we've got the result!
= ECSTASY
DNA fingerprinting as a technique can be used for identifying unknown bodies. DNA patterns can be matched between DNA from unknown persons and relatives. Once the unknown bodies are identified, they can be handed over to their relatives.

So, the correct answer is DNA fingerprinting.

Notes: There are various types of DNA polymorphisms, including:
- single nucleotide polymorphism (SNPs) -repetitive sequence polymorphism -insertion deletion polymorphism (Indel) -copy number polymorphism (CNV).