1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Bingel [31]
2 years ago
8

Why was it difficult to use DNA as evidence in a crime before PCR was invented? A. You need many copies of DNA for DNA fingerpri

nting. B. PCR is the only way to cut DNA into separate pieces. C. You need to be able to produce mRNA from DNA. D. It was impossible to copy DNA before PCR was invented.
Biology
2 answers:
Dovator [93]2 years ago
6 0

Answer:

The correct answer is option A. "You need many copies of DNA for DNA fingerprinting".

Explanation:

Polymerase chain reaction (PCR) is a method that revolutionized molecular biology for its ability to create multiple copies of DNA at specific sequences. For instance, before PCR was invented it was difficult to use DNA as evidence in a crime because many copies of DNA are needed for DNA fingerprinting, the most widely used test to match the sample with the suspect. Nowadays, thanks to PCR, a drop of blood or a hair is enough to perform a DNA fingerprinting test.

emmasim [6.3K]2 years ago
5 0
I would say A. But I’m not too sure.
You might be interested in
Sort...
elixir [45]

Answer:

i have no clue

Explanation:

6 0
3 years ago
What difference in axonal signaling determines whether we experience a mild or a strong sensation?.
katovenus [111]

Answer:

frequency of action potentials

Explanation:

4 0
2 years ago
Explain the rock cycle by describing how an igneous rock can become a sedimentary rock, then a metamorphic rock, and then an ign
Paraphin [41]
An igneous rock can be formed from cooled magma. The igneous rock can become sedimentary if it is broken down by wind or water. The sedimentary rock can become metamorphic if it becomes buried in the earth, where pressure and heat would turn it into a metamorphic rock. The metamorphic rock can then become an igneous rock by melting underground and turning into magma, flowing out of a volcano, and cooling. 
5 0
3 years ago
What does it mean when scientists say that living organisms share a universal genetic code?
dem82 [27]
I think the mean DNA but don't quote me on that.
4 0
3 years ago
Read 2 more answers
How long does a baby chick develop in its egg
Reil [10]
For nine month because it have to be strong

3 0
3 years ago
Read 2 more answers
Other questions:
  • A ribosome builds a chain of amino acids in the proper sequence <br> a. True <br> b. False
    7·1 answer
  • Which of the following is a value of biodiversity?
    14·2 answers
  • As intense pressure is placed on the planet's limited resources, businesses are again turning to technological innovation. New a
    8·1 answer
  • What happens to the energy in the bonds in glucose?
    10·2 answers
  • The ""preservationist ethic"" is associated with ______________ .
    7·1 answer
  • three species of northern American warblers are found to feed in different parts of the same spruce tree. This particular behavi
    12·2 answers
  • Anemia is a disorder where there is not enough hemoglobin in the blood. Why would this disorder lead to shortness of breath?
    10·1 answer
  • How do the rates of photosynthesis change with the physical environment?
    11·1 answer
  • The interactions between the red blood cell and important molecules, cells, and organs
    13·2 answers
  • Why is hematite called an ore?<br>​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!