can dna (i.e. from blood) be recovered after the area it was on has been cleaned?

Answer 1

It depends entirely on the effectiveness of the cleaning. The factors to consider are:

Temperature of the cleaning
Use of any chemical cleansing agents
Use of detergents including biologically active ones
The time and intensity of the cleaning
The nature of the surface being cleaned

In practise, cleaning of body fluid stains such as blood from items is rarely performed with 100% efficiency. For example, very small traces can be found in crevices.

The technique used for DNA profiling employs PCR or the polymerase chain reaction. This has the ability to multiply a single copy of DNA a million or more times. In very serious cases the method is used to amplify any DNA that could be on an item but which cannot be seen. Interpretation here can be challenged in court. If positive what it shows is that some-body's DNA is on an item but it does not tell you how it got there. It could be because the person has handled or touched the item itself but it could also be from cross transfer and from contamination.

Answer 2

depends on what it was cleaned with and how well the area was cleaned.

Detergent with a very accurate cleaning job...it would be extremely difficult to recover. The problem with blood is it seems to splatter everywhere so it's hard to clean all of it up. If you're talking about like a crime scene at least. DNA isn't only recovered from blood though. So often criminals leave hair and other things around that can later be traced to them.

but definitely a creepy question!

Answer 3

You can definitely clean all the blood away if you want to. You can also take all the DNA with it if you are judicious enough in cleaning.
However, bear in mind that DNA does not come from blood alone.

Answer 4

I've seen on those detective programs that they use some kind of ultra violet light to show up blood long after it has been cleaned but I don't know if DNA is still traceable from it.

Why, have you made a mess? - try poisining them next time.

Answer 5

Depends on how well you clean it and what with. Sand blasting the entire area followed by jet washing and finished off with wiping down with an acidic wash would get rid of just about everything.
However, they may ask you why your house is so clean...?

Tells us how it goes.

Answer 6

Hmm, CSI question!
I reckon it can. Your DNA is in every cell, so in theory all they need is one cell. But the less cells there are, the harder it is for them to find.

Also, I believe that you cannot extract DNA from certain body cells, maybe after they have been treated with a certain something (that uninformed CSI opinion coming out there I'm afraid)

Answer 7

It can be extracted but it may not be good enought and the dna strain may be altered depending on what it was the area was cleaned with

Answer 8

First, Mary is her call, no Maria. In Hebrew this is Mariam. they have do assessments on the blood. They introduced that it grew to become into human, it grew to become into male and it grew to become into style A. i've got no longer heard anymore element on it. Jesus grew to become into a hundred% divine and a hundred% human. He could be this way because of the fact he's God and God can do regardless of He needs. era. If a human has 40 six chromosomes (i'm no longer up on those issues yet) then God made Jesus with 40 six chromosomes. it is not considerable who gave it to Him, the place He inherited it from, the way it have been given there. God did it because of the fact he's God and He can. era. I see technological know-how as a type of philosophy and feels the could desire to could desire to have an answer for each little thing. If there's no longer answer then technological know-how in simple terms says they could desire to do extra discover ways to discover the answer. faith in simple terms says issues i do no longer could desire to have the reply to each little thing because of the fact God did all of it and understands all of it. Having faith is a significant bounce in a single's existence. this is scarey and could properly be packed with questions. yet faith's answer to each questions turns in direction of God.

Answer 9

You just kill some body? Remember you might leave your DNA in places you didn't think you came in contact with from forgetting or not noticing.

Answer 10

it can if your a scientist, a chemical called lominal is sprayed on it to bring the blood to the surface. then a swab would be taken of which the blood type DNA would be on!