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
Mumz [18]
3 years ago
15

The CRISPR/Cas9 system can cleave genomic DNA at sequences other than the desired target, a phenomenon referred to as off target

cleavage. To avoid off-target cleavag sites targeted for mutation should appear only once in the genome. What is the minimum length of the part of an sgRNA molecule that binds DNA whose base pair sequence would be expected to be unique within the fruit fly genome? (Assume that the size of the fruit fly genome is 1.4 x 108 bp, that the base pair sequence is random, and that GC.) AT- Multiple Choice 14 16 O 234 15 109
Biology
1 answer:
Deffense [45]3 years ago
3 0

Answer:

The minimum length of a sgRNA sequence to avoid off target cleavage by the CRISPR/Cas system in the fly fruit genome is 14 bases

Explanation:

We are trying to use the CRISPR/Cas system to cleavage the genome of the fruit fly (which is 1.4x10^8 bp long). Also we desire the cleavage to be unique. That means we need a target sequence long enough to be able to assume it will only appear once in the genome.

First, we should think that in every position, we can find one out of four different nucleotide (A, C, T, G). So, the probability of getting a sequence of a given length "n" will be (1/4)^n (We are assuming that the probability of finding a nucleotide in the position "i", it's independent of the nucleotide we find in any other position "j").

Also, to know how many times a sequence will appear in a genome (the expected value of occurrence), we must multiply the probability of that sequence to randomly occur by the length of the genome. For our specific example, the number of occurence of a sequence of length "n" is:

nºoccurence=[(1/4)^n]*1.4*10^8

But in this case, what we want is the expected number of times the sequence will appear to be 1, and we want to obtain the length of the target sequence (n).

Given the information above, we know that:

[(1/4)^n]*1.4*10^8 =1

[(1/4)^n]=(1/1.4*10^8)=1.4*10^-8

Then, if we want to calculate n, we can use logarithms and its properties to get:

log[(1/4)^n]=log[1.4*10^-8]

n*log[(1/4)]=log[1.4*10^-8]

n=log[1.4*10^-8]/log[(1/4)] => n=13.29 approximately.

As the sequence needs to have a natural number of elements, <u>we can conclude that using a target sequence of a minimum of 14 bases with the CRISPR/Cas system in the fly fruit genome should be enough to avoid off target cleavage.</u>

You might be interested in
Which of the following statements about renewable energy resources is true?
Brilliant_brown [7]

The statement that is true about renewable energy resources is that there are endless supplies of all renewable energy resources (option B).

<h3>What is renewable energy resource?</h3>

Renewable energy is the energy that is collected from renewable resources such as;

  • wind power
  • hydropower
  • solar energy

A renewable resource is that natural resource that is replenished by natural processes at a rate comparable to its rate of consumption by humans or other users.

This suggests that renewable resources have an unlimited supply and will likely not be exhausted. This is unlike the non-renewable counterparts like crude oil, gas etc.

Therefore, the statement that is true about renewable energy resources is that there are endless supplies of all renewable energy resources.

Learn more about renewable resource at: brainly.com/question/19604560

#SPJ1

4 0
1 year ago
Which experimental design decision would most likely produce invalid and unreliable results
zaharov [31]
Having more then one independent variable will give unreliable results. Hope this helps
3 0
3 years ago
Read 2 more answers
In the 1950s, when Watson and Crick were working on their model of DNA, which concepts were well accepted by the scientific comm
julia-pushkina [17]

Answer:

Option (1), (2) and (3).

Explanation:

DNA is the genetic material of all the living organisms present on earth. The DNA contains the nitrogenous bases, pentose sugar and the phosphate group. DNA strands runs in the opposite direction and shows polarity.  

Watson and Crick explain the structure of DNA based on the X ray diffraction produced by Rosalind. According to the structure, chromosomes are present in the nucleus and contains the DNA and wrapped around the proteins. The genes is considered as the functional segment of DNA.

Thus, the correct answer is option (1), (2) and (3).

6 0
3 years ago
Jeremiah is an 10-year-old male who is short in stature. His parents have become concerned as Jeremiah is now wetting the bed, d
joja [24]

Answer: 2) Tests used to diagnoses diabetes: Oral Glucose Tolerance Test, Fasting Glucose Test, Hemaglobin A1c, Random Blood Suger Test.

3) unexplained weight loss, frequent unination, lethargic, excessive thirst, nausea , and vomititng, increased hunger even though is still eating, blurry vision, bed-wetting in childern who did not do it previously, dry mouth,

Explanation:

7 0
2 years ago
One of the first breakthroughs in biotechnology was the discovery of the gene that makes insulin. What was the first step of thi
Elis [28]

the answer is a took the test

5 0
3 years ago
Read 2 more answers
Other questions:
  • The code name used by journalists Carl Bernstein and Bob Woodward for the high-ranking government official who helped them uncov
    8·1 answer
  • Why is system thinking important
    15·1 answer
  • Dietary ___________ and/or ____________ can increase blood LDL concentrations.
    14·2 answers
  • Which of the following locations would have the finest sedimentary particles?
    8·1 answer
  • What portion of the brainstem blends with the spinal cord after passing through the foramen magnum?
    11·1 answer
  • NOT BIOLOGY ITS PHYSICAL SCIENCE how are the allotropes of carbon similar and how are they different?
    15·1 answer
  • A reaction in which the entropy of the system increases can be spontaneous only if it is exothermic.
    11·1 answer
  • How does a cell interpret the genetic code 13.2?
    13·1 answer
  • A dairy farmer artificially selects and breeds cows that have extremely large udders, produce high quantities of a hormone calle
    10·1 answer
  • (GIVING BRAINLIEST!!)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!