Save
Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't know
Remaining cards (0)
Know
0:00
share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Chapter 17 Vocab

Chapter 17 Evolution

QuestionAnswer
All the genes in a populaiton Gene Pool
number of times an allele occurs in a gene pool Allele Frequency
Tall pea plants or Short pea plants are an example. Single Gene Trait
An example of this trait is height in humans Polygenic Trait
Individuals with a polygenic trait have a higher fitness on one end of the bell curve Directional Selection
Individuals with a polygenic trait have a higher fitness near the center of the bell curve Stabilizing Selection
Individuals with a polygenic trait have a higher fitness on opposite ends of the bell curve than in the middle Disruptive Selection
A random change in allele frequency in a population Genetic Drift
Type of genetic drift after there is a dramatic reduction in size of a population, changing the allele frequency Bottleneck
Changes in the allele frequency as the result of the migration of a small subgroup of a population Founder Effect
Population is not evolving, allele frequency does not change Genetic Equilibrium
Allele frequencies in a population should remain constant, unless one or more factors cause them to change. Hardy Weinberg Principal
Selection of individuals based on traits such as size, color, strength Sexual Selection
Population where members of the group can interbreed and produce fertile offspring Species
The formation of a new species Speciation
When 2 populations no longer continue to interbreed reproductive isolation
Two populations no longer breed because of differences in courtship, communication, rituals, etc. Behavioral Isolation
Separation of populations created by physical barriers like rivers, mountains, bodies of water, etc. Geographic Isolation
2 populations no longer breed due to a difference in mating timing Temporal Isolation
differences in mutation rates of DNA are used to estimate the time that 2 species have been evolving independently molecular clock
Created by: jamesweide
 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards