Question

Which of the below statements is NOT a legitimate mechanism by which natural selection can maintain...

Which of the below statements is NOT a legitimate mechanism by which natural selection can

maintain genetic variation in a population.

  1. Overdominance. When there is heterozygote advantage, as long as a population starts

with two alleles (i.e., is not fixed for one or the other allele) both alleles will be maintained

at a stable equilibrium.

  1. Fluctuating selection. Temporally or spatially varying selective regimes that favor

different genotypes can preserve genetic variation. The maintenance of variation by this

mechanism requires a fairly narrow set of conditions.

  1. Frequency-dependent selection. If the rare genotype has a fitness advantage and the

common genotype a selective disadvantage, then genetic variation will be maintained in

the population.

  1. All three are viable mechanisms by which natural selection can maintain variation

Homework Answers

Answer #1

Answer:

All these options are viable mechanisms that help in maintaining genetic variation.

Explanation:

Natural selection maintains genetic variation by selecting fit organisms. In many cases ,heterozygotes have fitness advantage which allows both the alleles to continue in population.For example: sickle called heterozygotes are resistant to malaria.

Mutation and recombination also allows recessive and rare alleles to have more fitness and prevent them from elimination.

Varying regimes for natural selection also helps in maintaining genetic variation because different areas and their population have different conditions and environment and hence different selection criteria.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Natural selection tends to reduce genetic variation within a population by disfavouring particular alleles. However, in...
Natural selection tends to reduce genetic variation within a population by disfavouring particular alleles. However, in some situations selection can help maintain genetic variation rather than erode it. Explain how this can happen using an example.
Natural selection tends to reduce genetic variation within a population by disfavouring particular alleles. However, in...
Natural selection tends to reduce genetic variation within a population by disfavouring particular alleles. However, in some situations selection can help maintain genetic variation rather than erode it. Explain how this can happen using an example.
All of these but one can be caused by natural selection. Which could NOT be a...
All of these but one can be caused by natural selection. Which could NOT be a result of natural selection? New alleles being added to the population as necessary Different phenotypes within a species being favored in different habitats. Decreased allele frequency in a population Higher fitness in best-adapted individuals.
Which statement below describes one of the reasons scientists were initially slow to accept natural selection...
Which statement below describes one of the reasons scientists were initially slow to accept natural selection as a major mechanism of evolutionary change: a) many scientists assumed inheritance worked through a blending mechanism, so variation required for natural selection would be rapidly lost from populations (b) many scientists assumed inheritance was particulate (as described by Mendel), so variation required for natural selection would be rapidly lost from populations (c) Many scientists assumed differences in fitness among individuals in a population...
Which mechanism of evolutionary change is random? gene flow natural selection genetic drift sexual selection Which...
Which mechanism of evolutionary change is random? gene flow natural selection genetic drift sexual selection Which mechanism of evolutionary change results in a population that is better fit for current environmental conditions? sexual selection genetic drift gene flow natural selection Researchers studying polymorphic garter snakes to test whether predation patterns by birds helped to influence the snake’s color pattern. They created clay models of snakes (both striped and melanistic) and looked to see how many of the models were attacked...
1.A population of alpacas all have an identical fur length phenotype. During a particularly cold winter,...
1.A population of alpacas all have an identical fur length phenotype. During a particularly cold winter, longer fur would be beneficial as it would provide them with greater insulation. Select the correct answer given this information. A. the alpacas will evolve by natural selection as longer hair would be favorable in their environment. B. a mutation for longer fur will likely develop in this population. c. alpacas will longer fur will likely migrate into this population as they have a...
The picture shown below shows variation among three individuals with respect to 4 nucleotides - AGAT....
The picture shown below shows variation among three individuals with respect to 4 nucleotides - AGAT. What do you think what type of variation is this? AGAT different repeat numbers in different individuals .png Minisatellite Single nucleotide polymorphism Short Tandem Repeats Which of the following statements is TRUE about DNA matching? Typical difference between the genomes of human beings and Chimpanzees is estimated to be 25 % Typical difference between the genomes of human beings and Drosophila is   estimated to...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT
Active Questions
  • The following sample observations were randomly selected. (Round intermediate calculations and final answers to 2 decimal...
    asked 13 minutes ago
  • what type of graph is best suitable for data obtained from customer ratings. The ratings are...
    asked 16 minutes ago
  • Determine the cumulative 15-year 18 kip ESAL’s in the design lane for 2-lane highway for the...
    asked 24 minutes ago
  • Q: Dr.Grimace, the evil dentist, is trying to find out if his patients suffer from periodontal...
    asked 24 minutes ago
  • After collecting data on 19283 dogs, you find that male vallhunds have an average weight of...
    asked 26 minutes ago
  • Research Target Corporation and assess your satisfaction with the company you researched and make recommendations about...
    asked 27 minutes ago
  • Evidence suggests that 70% of FSU students like turtles. Suppose we randomly sampled 15 FSU students....
    asked 27 minutes ago
  • Ulrich challenges the appropriateness of the nearly universal symbolism of the spinning wheel as the marker...
    asked 28 minutes ago
  • Differential Equations: Please try to computer type, if not possible be clear and organize. Thank you...
    asked 28 minutes ago
  • In your opinion, what are the three (3) most important benefits an employer can give to...
    asked 34 minutes ago
  • In a test of the effectiveness of garlic for lowering​ cholesterol, 81 subjects were treated with...
    asked 36 minutes ago
  • How does the 95% confidence interval correspond to the reported conclusion at a 0.05 significance level?...
    asked 37 minutes ago