100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
ASU BIO 182 Exam 2 Questions with Verified Answers.| Latest 2024/2025 CA$18.83   Add to cart

Exam (elaborations)

ASU BIO 182 Exam 2 Questions with Verified Answers.| Latest 2024/2025

 18 views  0 purchase
  • Course
  • Institution

ASU BIO 182 Exam 2 Questions with Verified Answers. 1 / 27 1. How many modes of selection are 3 there? 2. What are the modes of selection? Stabilizing selection, directional selection, and disruptive selection 3. Stabilizing Selection The mean of the trait remains similar over time but the st...

[Show more]

Preview 3 out of 27  pages

  • June 15, 2024
  • 27
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers
avatar-seller
ASU BIO 182 Exam 2 Questions with Verified Answers. 1. How many modes of selection are 3 there? 2. What are the modes of selection? Stabilizing selection, directional selection, and disruptive selection 3. Stabilizing Selection The mean of the trait remains sim- ilar over time but the standard de - viation decreases 4. Directional Selection The mean phenotype shifts in a particular direction 5. Disruptive Selection The standard deviation of the trait increases as individuals with the mean value disappear. 6. Stabilizing Selection Explained The stronger the selective pres- sure against extreme phenotypes, the narrower the distribution of phenotypes will be in future gener - ations. In the end, the size of the standard deviation will reflect both the strength of selection against extremes and the frequency of mutations creating new variation. Thus, when we observe a wide ASU BIO 182 Exam 2 Questions with Verified Answers. range of phenotypes in a popula - tion, we might infer weak selective pressure against the extremes. 7. Directional Selection Explained The population's environment changes. The mean phenotype in the population may no longer be the phenotype that reproduces the most. Over time, we should expect the mean phenotype to shift high - er or lower, depending on the di - rection of selective pressure. Once the mean phenotype catches up to the change in the environment, sta- bilizing selection will resume. The environment must change slowly enough for the population to per - sist. If the environment changes too quickly, no members of the population will be able to repro - duce, leading to extinction. 8. Disruptive Selection Explained A population can occupy an en- vironment in which individuals with extreme phenotypes repro - duce more than individuals with the mean phenotype. This mode of selection occurs when several distinct strategies confer greater reproductive suc - cess than other strategies do. Can produce new species when in - dividuals choose to mate only with similar -looking individuals. This non -random mating prevents recombination from restoring inter- mediate phenotypes. 9. Evolution by Natural Selection ASU BIO 182 Exam 2 Questions with Verified Answers. 10. Selection and Fitness Heritable variation leads to differ - ential reproductive success 11. Directional Selection Equation y=bx+c y=relative fitness x= trait value b= strength of selection c=parameter 12. True or False? If the slope of the rela- tionship between the phenotype and fitness is positive, natural selection would decrease the phenotype over generations. False, it would increase the value of the trait over time 13. Stabilizing Selection Equation y=ax^2+bx+c y=relative fitness x= trait value a/b= strength of selection c= parameter 14. True or False? If the parameter for the squared term is negative, natural se - lection will likely stabilize the pheno - type at an intermediate value. True, depends on how large the parameter is for the squared term 15. What is fitness? The relative number of viable, fer- tile offspring 16. What does natural selection do? Natural selection not only changes mean phenotypes but also increas -

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller AcademiaExpert. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for CA$18.83. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

75323 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
CA$18.83
  • (0)
  Add to cart