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In case of robbery, the police visit the robbery scene and collect some samples like foot print or any item suspected to have been touched by the robber. The sample is then taken to laboratory for DNA analysis. Does that mean whatever we hold or touch, our DNA sticks or drops on it?

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    $\begingroup$ "Transmittable" might not be the right word, but yes, we deposit DNA on things we use/touch. $\endgroup$ – anongoodnurse Dec 29 '18 at 17:11
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    $\begingroup$ By your use of the term "transmittable", your title make it feel like you are talking about parent to offspring transmission of DNA. $\endgroup$ – Remi.b Dec 29 '18 at 19:31
  • $\begingroup$ @Mallam_Bello, it's inappropriate to say that"DNA" drops on the surface we touch. The cells of the body drop $\endgroup$ – Anonymous Jan 27 at 4:58
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Yes, we leave DNA on everything we come in contact with. Even simply standing, we shed skin cells and hair (although only the follicle has DNA) etc. DNA may also be transferred from clothes to clothes.

You might be interested to read this article :) http://www.forensicsciencesimplified.org/dna/how.html

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Yes, and as DNA technology becomes more sensitive, there is the unfortunate effect where it's very easy to detect the DNA of a person who hasn't personally been in the location, or was a long time ago. The amplification of DNA is incredibly efficient now, theoretically needing a single cell

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    $\begingroup$ This is not only a theoretical thing - it is possible to amplify a single cell. $\endgroup$ – Chris Dec 30 '18 at 10:32

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