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
Ghella [55]
2 years ago
9

How does DNA technology help us compare organisms and model relatedness?

Biology
1 answer:
Olenka [21]2 years ago
3 0

Answer: Comparison of whole genome sequences provides a highly detailed view of how organisms are related to each other at the genetic level.

Explanation: Sorry if this doesn't help

:(

You might be interested in
Which of the following structures help the cell remove wastes:
drek231 [11]

Answer:

Vesicles help the cell remove wastes

4 0
2 years ago
Read 2 more answers
A DNA fragment is introduced into the lacZ gene of a plasmid, which also contains an ampicillin resistance gene. What is the app
zhenek [66]

Answer: The bacteria transformed with this particular plasmid will form white colonies on the plates containing ampicillin and Xgal.

Explanation: The lacZ gene produces an enzyme called β-galactosidase which is responsible for the breakdown of lactose into glucose and galactose. The lacZ gene is one of the three genes (the other two being lacA and lacY) of the lac operon which is responsible for the transport and mechanism of lactose in E. coli and many other bacteria.

In recombinant DNA technology, when a plasmid is to be used to transform a host cell, such markers are used to help screen the transformed cells from the ones that have not taken up the plasmid. Xgal present in the plates is an artificial substrate which is hydrolyzed by

β-galactosidase into 5-bromo-4-chloro-indoxyl which will dimerize and oxidise into 5,5'-dibromo-4,4'dichloro-indigo. This is a blue pigment which will give blue color to the bacterial cells. Introducing a DNA fragment in this lacZ gene will make it non-functional so it will not be able to produce the enzyme.

Therefore, when a bacterial cell is transformed with a plasmid containing ampicillin resistance gene and a DNA fragment introduced in the lacZ gene and then grown on plates containing ampicillin and Xgal, white colored colonies will appear. The white colonies will show the bacterial cells that have successfully taken up the plasmid with the DNA fragment incorporated in the lacZ gene as this will render the gene non-functional and will not produce β-galactosidase which will breakdown Xgal to give blue colonies. Since the plates contain ampicillin, only the bacterial cells that have been successfully transformed with the plasmid ( the ones that have the DNA fragment and the ones without it) will grow as the ampicillin resistance will give them resistance against ampicillin in the plates. The bacterial cells that have not taken up the plasmid will not be resistant to ampicillin and will not form colonies on the plate.

This is called blue-white screening which is used to identify successfully transformed host cells. A picture of this is given in the attachment, taken from the following website:

https://www.mun.ca/biology/scarr/Blue_&_White_Colonies.html

8 0
3 years ago
Which of the following choices correctly describes the composition of the cell membrane
lukranit [14]
I would say the second one

3 0
2 years ago
Read 2 more answers
What are two example of animal behaviors and how it affected the survival of the animal species
Rom4ik [11]
An example of a person is not a bad guy and I don’t want him going back
3 0
3 years ago
Which lifestyle choices lead to good health? Check all that apply.
Neporo4naja [7]

Answer:

Yes, you are correct! C,D and E are correct

4 0
3 years ago
Read 2 more answers
Other questions:
  • Which statement correctly compares the inheritance of blood type in humans and the inheritance of length of ears in corn plants?
    8·2 answers
  • Drugs that block the operation of a neurotransmitter are called _______
    14·1 answer
  • A dehydrated seagull has a choice between a sea turtle, a shark, and an octopus that have washed up on the beach to make a meal
    15·1 answer
  • Help, pick ONE AND right answer only please
    9·1 answer
  • Which food has the most carbohydrates?
    13·1 answer
  • What is some evidence that makes plate tectonics is such a firmly believed idea?
    7·1 answer
  • What's a quote in the poem "two kinds" that encouraging
    10·1 answer
  • What is the site of cellular respiration ?​
    12·1 answer
  • Which type of tissue in a blastula gives rise to skin and eyes in an animal
    12·1 answer
  • Would needed to target a cytosolic protein (fully translated) to the exoplasmic face of the plasma membrane?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!