Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
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. Your email address is only used to allow you to reset your password. See 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
edit
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

heredity

bio

QuestionAnswer
What are diploid cells? Diploid cells have two complete sets of chromosomes and diploid cells are always twice the haploid. (Ex. somatic (body) cells like skin). (2n)
What are haploid cells? Haploid cells have only 1 of each homologous pair. (Ex. gametes (egg, sperm, or spores).
What is the law of segregation? The law of segregation states that only 1 of each homologous chromosome is passed on to offspring.
Define meiosis. A process of producing gametes with half the number of chromosomes. It consists of 2 cell divisions and only 1 replication of DNA. This is called a "reduction division".
How is meiosis different from mitosis? Meiosis has 2 divisions, splits twice, makes 4 cells, is not a cycle, and they are not identical.
Where does crossing over occur? Prophase 1
What is genetic variation? Meiosis and sexual reproduction creates genetic variation or diversity.
What are some ways meiosis creates genetic variation? Crossing over, independent assortment (genes for one trait are not inherited with genes for another trait), law of segregation (each parent passes only 1 copy of each trait to offspring), and mutations.
Gametes combine to form..? Zygots
What is amniocentesis? A diagnostic test to look at the fluid around the baby to isolate baby's cells/DNA. Can be used to make a karyotype.
What are karyotypes? Karyotypes are images showing all the chromosomes of a individual, arranged in homologous pairs from largest to smallest. Biological sex can also be determined from a karyotype.
What are the sex chromosomes? XX=females XY= male
What are autosomes? Autosomes are the other pairs of chromosomes all have in common.
Nondisjunction may result in: Monosome-1 chromosome of a pair Trisomy-3 chromosomes of a pair
What is nondisjunction? Some genetic conditions are caused by chromosomes failing to separate during meiosis.
What is heredity? Is the passing of traits from parents to offspring, also called inheritance.
What are genetics? Is the study of heredity.
What are genes? Are segments of DNA that codes for a trait.
What is allele? Refers to the different versions of a gene, individuals have 2 alleles for each trait.
What is a dominant trait? A trait that always appears if present. (Shown by a capital letter)
What is a recessive trait? A trait that is hidden by the dominant and only appears when no dominant is present. (Shown by a lowercase letter)
What is phenotype? Refers to the physical appearance of an individual. (round or wrinkle seeds)
What is genetype? Refers to the combination of alleles of an individual may be homozygous or heterozygous. (RR, Rr, rr)
What is homozygous? Contains two of the same alleles. (RR or rr)
What is heterozygous? Contains two different alleles. (RR)
Created by: CoraBaker
Popular Biology sets

 

 



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