Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


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.
Didn't know it?
click below
Knew it?
click below
Don't know
Remaining cards (0)
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



____________are the physical characteristics that are studied in genetics. Traits
Scientists call the factors that control traits ________________. genes
A ______________ allele is one whose trait always shows up in the organism when the allele is present. dominant
A ___________ has two different alleles for a trait hybrid
TT means that two ______________ alleles are present. dominant
Tt means that one __________ and one _______ allele are present. dominantfrecessive
tt means that two _____________ alleles are present recessive
___________is the likelihood that a particular event will occur. Probablity
A _______ ___________ is a chart that shows all the possible outcomes of a genetic cross. punnett square
An organism’s _________ is its physical appearance. phenotype
An organism’s _________ is its genetic makeup. genotype
An organism that has two identical alleles for a trait is said to be ________. homozygous
A _____________ organism has two different alleles for a trait. heterozygous
In __________________, the alleles are neither dominant nor recessive. codominance
The _____________ is the basic unit of structure and function in the body. cell
The function of the ___________ system is to enable movement. muscular
The main function of the ____________ system is breathing (taking in oxygen and releasing carbon dioxide) respiratory
The function of the ____________ system is for support and protection (ex: skull, ribs) skeletal
The ___________ system includes the skin and protects from the external environment. integumentary
The __________ system breaks down food and absorbs nutrients. digestion
The __________ system removes wastes and regulates water. excretory
The ____________ system transports oxygen and nutrients to the cells. cardiovascular
The _____________ system directs all the body functions. nervous
Created by: lschramme



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:
restart all cards