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
What is the source of energy for whom?
muminat
The plants use the sun as their energy, using photosynthesis.
The insect and animals get their energy from the food they eat.
And bacteria get their energy by decomposing dead organisms.

You might have to do the research on what each animal eats if you need specific answers.
I'm sorry this isn't much, but hope this helps you out! :)
7 0
3 years ago
The current understanding of created "kinds" is:
TEA [102]

The current understanding of created "kinds" is related to higher taxonomic orders and it is not easy to explain or define the created “kinds” like species. Taxonomy is the branch of science in which we study about the classification of something but mostly it is related to the classification of organisms.

8 0
3 years ago
A cone has a volume of 7,560 cubic millimeters . what is the volume of a similar come that is one sixth size of this cone?
IRINA_888 [86]
Answer: 1,260 cubic mm

(1/6)(7,560) = 7,560/6 = 1,260
multiplying by 1/6 is the same as dividing by 6 (6 and 1/6 are reciprocals)

6 0
3 years ago
Read 2 more answers
Which of the following statements best supports Mendel's Law of Segregation?
SSSSS [86.1K]

Answer: The answer is C, the individual alleles that make up the gene must SEGREGATE (which means separate) during gamete formation, hence the name “law of segregation”

Explanation: Hope this helps

4 0
3 years ago
Key
Anastaziya [24]
Yellow is the answer! :)
8 0
3 years ago
Other questions:
  • What gas is changed by some bacteria into a form that plants can use?
    13·1 answer
  • Leonardo is a five-year-old boy. While playing on the shore, he threw an empty, capped, plastic bottle into the waves. What do y
    15·1 answer
  • Neurons and muscle cells perform different functions. In the body, these cells have the same . The function of muscle cells is ,
    6·2 answers
  • Please help I’m not sure what I’m supposed to do there is no word bank
    13·1 answer
  • In which type of environment are plants most likely to use a C4 pathway of carbon fixation? cold and wet cold and dry hot and we
    12·2 answers
  • which phrase best summarizes the theory of evolution by natural selection? a. parent organisms pass on traits they have acquired
    6·2 answers
  • What are the seven classification levels of HUMANS
    13·1 answer
  • In a freshwater lake, a population of bony fish called the stickleback were studied over several decades. The presence of armor
    12·2 answers
  • In some developing nations, the percentage of animal protein from fish in the diet can be as high as____. 20 percent 80 percent
    9·1 answer
  • When writing a research paper, look for credible sources. Science doesn’t show bias, but humans do. Avoid sites and articles tha
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!