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
Rufina [12.5K]
3 years ago
5

Two morphologically identical Drosophila populations live in Lower Nahal Oren, Mount Carmel, Israel. There are two slopes of a v

alley that face each other and drosophila live on both slopes (they share a common ancestor). The environment is very different even though they are very close. In the center of the valley is an area in which flies from each side have an opportunity to mate. (an aside: This is frowned upon by fly society buy these tiny Montagues and Capulets persist). Evaluate each scenario:
Biology
1 answer:
Grace [21]3 years ago
6 0

Answer:

There are two possible scenarios

Scenario 1) Genetic flow is acting on these populations

Scenario 2) The original population has recently diverged

Explanation:

Scenario 1:

These two populations of flies should probably express some phenotypic difference due to the environmental condition on each slope. Remember that the phenotype is the product of interaction between the genotype and the environment. However, <em>the difference between populations would exist if they were isolated and separated by an ecological or biological barrier.</em> The <em>barrier would impede genetic flow, and each population would have its particular genetic charge and phenotype</em>.

In the exposed situation, we know that each population inhabits a slope. And that the slopes differ in the environmental conditions. But in the center of the valley, these two populations get to meet and mate. The valley is acting as a corridor between both groups and allows the <u>genetic flow</u> to occur.

Let us remember that gene flow is an evolutive strength only if

  • there exists migration from one population to the other, and
  • the allelic frequency in one generation is different from the allelic frequency in the next generation.

Genetic flow acts<u> homogenizing the allelic frequencies between the two populations</u>, and it might introduce variability into the new one. For genetic flow to be possible, there needs not only the <em>movement of the genes from one population to the other but also the reproduction process on the new population</em>. Hence, it <em>involves an interaction between the dispersion pattern and the reproductive system</em>.

Individuals from both groups get to mate in the valley, leaving fertile offspring. The offspring, carrying genes from both populations, are included in one or the other group, where they will reproduce. In each population, the frequency of genes of the other group increase with time as the flies keep mating. Eventually, genetic flow homogenizes the variability between both populations, making them look similar.

Scenario Two:

It might be an early dispersion event in which the common ancestor of both populations used to inhabit the center of the valley. With time, and as the original population got bigger, dispersion took a significant role. Flies began moving into both slopes. Even though each area has different environmental conditions, there has not been enough time for these animals to adapt morphologically to each side, so they still look identical. Also, as it is an early event, these two new groups are not separated yet, so they have not developed biological barriers between them, and individuals can still mate in the center of the valley.  

You might be interested in
Copper is listed in the 29th position in the periodic table. It’s used for conducting electricity. What is copper?
Llana [10]

Answer:

stuff

Explanation:

8 0
3 years ago
Read 2 more answers
What type of information is available to scientists through a Global Positioning System (GPS) device?
tiny-mole [99]

The answer is C. This is the only choice that has to do with location.

6 0
3 years ago
Read 2 more answers
How are the lytic and lysogenic cycles similar and different in terms of process and infection?
ELEN [110]

Answer:

<h2>Lytic cycle: involve that there is rupture( lysis) of the host cell and release many copies of virus. </h2><h2>Lysogenic cycle:  involve the insertion of the nucleic acid of a bacteriophage into host genome, known as prophage. </h2>

Explanation:

There are many  similarities and differences between lysogenic and lytic cycles that;

1. Lysogenic cycle of bacteriophage :

i)  in lysogenic cycle:  bacteriophage insert its DNA with that of a host, known as prophage and it replicates with host.

2. Lytic cycle of bacteriophage:

i) lytic cycle is that it results in many copies of the virus very quickly and the cell is ruptured and many copies of virus are released.

4. Similarity is that in both cycles bacteriophase inter into the host and use their machinery.

4 0
3 years ago
The value of n, the Hill coefficient, for hemoglobin is about _________ as great as the value for myoglobin.
ludmilkaskok [199]

The value of n, the Hill coefficient, for hemoglobin is about 2 to 3 times as great as the value for myoglobin.

Hill Equation

The two closely related equations that help to explain the binding of macromolecules to ligands are called the Hill equation. It helps to quantify the interaction between various ligand binding sites.

Hill coefficient

It is used to describe the cooperativity of ligand binding. It can be positive and negative depending on the value of the Hill coefficient. If the value of the Hill coefficient is more than one then it exhibits positively cooperative binding and if it is less than one then it exhibits negatively cooperative binding. Then there is the noncooperative binding where the Hill coefficient value is one. As for the hemoglobin and myoglobin, the values are,

  • Hill coefficient of hemoglobin is 2.7 - 3.
  • Hill coefficient of myoglobin is 1.0.

Thus hemoglobin is positively cooperative and myoglobin exhibits noncooperative binding.

Learn more about hemoglobin:

brainly.com/question/15011428

#SPJ4

4 0
2 years ago
The plasma membrane of a skeletal muscle fiber is called the
victus00 [196]

Answer:

A skeletal muscle fiber is surrounded by a plasma membrane called the sarcolemma, which contains sarcoplasm, the cytoplasm of muscle cells.

Explanation:

5 0
3 years ago
Other questions:
  • What could be the reason for this
    9·1 answer
  • I need help &gt; &lt; i think the answer is C
    10·1 answer
  • Because the common cold is caused by a _____ it is useless to try to prevent or cure a cold with antibiotics
    7·2 answers
  • In the 1950s, when watson and crick were working on their model of dna, which concepts were well accepted by the scientific comm
    9·1 answer
  • When hiv (the human immunodeficiency virus) infects a cell,it inserts a DNA copy of its genetic material into the host cell's ge
    7·1 answer
  • What did the comparative study on chytridiomycosis teach scientists studying white-nose syndrome in bats?Select one:a. Humans we
    8·1 answer
  • In which type of exercise would fat reserves be used to create ATP
    13·1 answer
  • Question 13 (5 points)<br> What characteristics do all of the outer planers share?
    15·1 answer
  • HELPPP I GIVE BRAINLIEST!!!
    15·1 answer
  • Name and explain all of the stages of the carbon cycle.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!