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
lana66690 [7]
3 years ago
7

Consider a hypothetical locus with two segregating alleles (A and B). Population size is small, mutation is absent, and neither

of the two alleles has a selective advantage. After a long period of time (many generations), what will occur?a) The population will eventually become monomorphic for one of the two alleles.b) Allele frequencies will cycle over time.c) Balancing selection will maintain both alleles.d) Allele frequencies will change over time, but both alleles will remain.e) Allele frequencies will remain constant.
Biology
1 answer:
77julia77 [94]3 years ago
7 0

Answer:

The preferable option will be - A.

A. The population will eventually become monomorphic for one of the two alleles.

Explanation:

The population will eventually become monomorphic for one of the two alleles because  -

  • Here mutation is absent.
  • No other allele is allowed to get involved here.
  • The population size is small.
  • As allele A and B are fixed for that population after many generations the population will become monomorphic for that two alleles.
You might be interested in
How would an x-ray technician position the camera to produce a frontal view of a patient's abdominal cavity?
leva [86]

Answer: Option A. "In front of the patient, pointing at his navel"

Explanation:

The X-ray of abdominal cavity is known as Abdominal x-ray. It has same principle as X-ray and uses ionizing radiation to take pictures of inner parts of abdominal cavity such as intestine, stomach, liver and spleen. it is used to diagnose patients with vomiting, unexplained pain, and nausea.

While diagnosing  patient's abdominal cavity, x-ray technician position the camera in front of the patient, pointing at his navel in order to produce a frontal view of abdominal cavity.

Talking about a x-ray machine, it is a compact apparatus which can be taken to the patient in a hospital bed or the emergency room. The x-ray tube connects flexible arm which further extends towards the patient and an x-ray film holder (image recording) plate is placed under the patient.

The technologist will ask the patient to take position on the x-ray table or bed and will position x-ray machine over the abdominal area of the patient, in order to take the frontal view of abdominal cavity. The patient will be asked to hold their breathe to get a clear picture. The technician will turn on the x-ray machine that allows  x-ray machine  to produce a small burst of radiation which passes through the abdominal area and records the frontal view of  patient's abdominal cavity. As a result, soft tissue shows up in shades of gray and air appears black while bones appear white on the x-ray, through which patient can be diagnosed.

Hence, the correct option is A "In front of the patient, pointing at his navel".

8 0
3 years ago
How Much Of The Suns Energy That Comes To Earth Is Used In Photosynthesis? What Happened To The Rest Of The Energy?
Angelina_Jolie [31]

Answer:

Of all the energy that does reach Earth, slightly less than 34 percent is reflected back to space by clouds. The Earth itself reflects another 66 percent back to space. Less than one percent of the total energy that reaches Earth is used by plants for photosynthesis.

Explanation:

8 0
3 years ago
After phosphates and nitrates have entered a water
frosja888 [35]

After phosphates and nitrates enter a water system, the steps of eutrophication include the rapid growth of algae, death of underwater plant species, depletion of oxygen in the water, and the death of fishes and invertebrates. The correct option would be B.

Eutrophication refers to the excessive enrichment of water bodies by nutrients such as phosphates and nitrates thereby facilitating the rapid growth of some aquatic species with negative effects.

Once a water body becomes excessively enriched with phosphates and nitrates, the following is a sequence of events that follows:

  • Algal bloom: the nutrients facilitate the rapid growth of algae
  • The bloom of algal species results in the death of underwater plants as a result of inadequate light.
  • The death of the underwater plants and the accompanying microbial activities in decomposing them cause oxygen levels in the water to drop.
  • Reduction in oxygen level causes fishes and other water invertebrates to die due to hypoxia

Therefore, the correct steps of eutrophication according to the illustration is IV, II, I, and III.

More on eutrophication can be found here: brainly.com/question/13232104

6 0
3 years ago
Which part of the cell does this illustration represent?
Lisa [10]

Mitochondria or golgi

4 0
3 years ago
Select the correct answer from each drop-down menu. rna interference is a mechanism of eukaryotic gene regulation. in this mecha
rosijanka [135]

The dicer enzyme processes dsRNA and forms siRNAs, which suppress the expression of target genes by cutting mRNA. 1) siRNA 2) RNA.

<h3>What are siRNA fragments?</h3>

siRNA means small interfering RNA. This is a silencing RNA molecule involved in the RNA interference mechanism, intervening in the expression of a specific gene.

siRNAs are complementary double-stranded RNA molecules composed of about 20-21 nucleotides. siRNA originates from a long double-stranded RNA (dsRNA).

The dicer enzyme cuts dsRNA molecules and produces siRNA. siRNAs suppress the expression of target genes when cutting messenger RNA.

siRNAs suppress the expression of target genes by cutting the complementary messenger RNA (mRNA) into two halves. This is accomplished by the interaction of the siRNA with the RISC complex (RNA-induced silencing complex).

The two mRNA halves are later degraded by the cellular machinery, leading to the suppression of the gene expression.

siRNAs also participate in other pathways related to RNAi, such as in antiviral defense or in the chromatin structure organization.

RNA interference is a mechanism of eukaryotic gene regulation. In this mechanism, the enzyme dicer cuts dsRNA into smaller fragments called (1) siRNA, which form a complex with RISC and degrade specific (2) RNA.

You can learn more about siRNA at

brainly.com/question/7508257

#SPJ1

5 0
1 year ago
Other questions:
  • Which feature helps shortleaf pines resist fires
    7·2 answers
  • In watermelons solid green rind color is dominant to strips if you cross two watermelon plants that are heterozygous for rind co
    14·1 answer
  • What is the population of beijing now?
    12·2 answers
  • Which of these engulf bacteria and break them down?
    13·1 answer
  • Majkaksksjdnfnnfkfkfkfn
    10·1 answer
  • If a stimulus to a neuron is great enough, ________ is reached and an action potential is generated.
    6·2 answers
  • How important is it for a cell to maintain the same number of chromosomes? Explain.
    13·1 answer
  • How many genes code for a Mendelian<br> Trait?<br> 1.)2<br> 2.)1<br> 3.)3<br> 4.) A TON!
    12·1 answer
  • 5. Which of the following statements describes processes that occur
    15·1 answer
  • How does the codon help determine the function of the protein it is coding for?.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!