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
zloy xaker [14]
3 years ago
10

A certain segment of DNA can be used as a molecular clock. Its rate of mutation is one mutation per 10 million years. Examine th

e DNA segments from two different species: Species A: CTTAAGCTAGTAAGGACC Species B: CATAAGTTAGTAAGGTCC Using this example, explain how this information can be used to determine how long ago these two species shared a common ancestor.
Biology
2 answers:
Assoli18 [71]3 years ago
6 0

Answer:

We would use the molecular clock in order to determine how long ago these species shared an ancestor. If we compare the DNA sequence of the two species, we would find that three mutations have taken place. Thus, 30 million years would have passed to evolve three mutations. Now, we divide 30 million by two because there are two species, and we can infer that they must have shared a common ancestor around 15 million years ago.

lawyer [7]3 years ago
4 0

Answer:

The correct answer would be 30 million years.

The molecular clock is a technique used to determine the time when the two species diverged from a common ancestor. It uses the mutation rate to determine the same.

Mutation rate is the rate at which a number of mutations take place in a given unit time.

For example, the mutation rate in a given question is one mutation per 10 million years, that is, one nucleotide is mutated in 10 million years.

If we compare the DNA sequence of the given two species, we would find that three mutations have taken place.

Species A: CTTAAGCTAGTAAGGACC  

Species B: CATAAGTTAGTAAGGTCC  

Thus, 30 million years would have passed to evolve three mutations.

Hence, they must have shared a common ancestor around 30 million years ago.

You might be interested in
What are two events that can take place for Secondary succession to occur?
Nadya [2.5K]
Researched (copied and pasted so use in your own words)

Disturbances such as forest thinning, floods, fire and wind can all lead to secondary succession. Examples of secondary succession are the gradual replacement of old fields by forest or the vegetation recovery and change following wildfire occurrence.
3 0
3 years ago
Help please this have points
kodGreya [7K]
It’s the 3rd one! The O + O!!
6 0
3 years ago
____________ results from chemicals in car exhaust reacting with the sunlight.
Arte-miy333 [17]

Answer:

smog

Explanation:

Photochemical smog is a mixture of pollutants that are formed when nitrogen oxides and volatile organic compounds (VOCs) react to sunlight, creating a brown haze above cities.

5 0
3 years ago
Tortoise shells and snail shells are similar in function: they protect the organism from predators. Based on a comparison of the
andrezito [222]

The correct answer is D. Tortoises and snails have analogous organs, and they don't belong to the same species.

6 0
3 years ago
Read 2 more answers
Why might a trait that is an advantage today become a disadvantage in the future
Nuetrik [128]

Advancement in technology. For example, body odor on humans was considered attractive thousands of years ago. Now it's just considered a hassle and we try our best to get rid of the smell.

3 0
3 years ago
Other questions:
  • Which activity seems to be the most important health habit in old age?
    12·1 answer
  • Thomas's biological mother and father are both gifted athletes. He was adopted by a couple who had no interest in him being invo
    11·1 answer
  • What do the two molecules below have in common? glucose and fructose
    14·1 answer
  • Why is it important to control Burmese python population in Everglades national park? You need a strong argument and you need to
    13·2 answers
  • Asexual reproduction occurs during _____. chromosome exchange between organisms of different species meiosis mitosis. fertilizat
    8·2 answers
  • The genetic material dna consists of basic subunits called ________.
    8·1 answer
  • Pluots are a fruit produced by cross-breeding plums and apricots. The outside of the fruit resembles the skin of a plum, while t
    8·1 answer
  • Artificial eutrophication is caused by
    9·1 answer
  • Ill give a Brainliest if it is right
    8·1 answer
  • What food does a artic animal eat?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!