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

DAT ch 3

bio- genetics from coursesaver notes

QuestionAnswer
TRUE/FALSE Genes on the same chromosome will stay together unless crossing over occurs true
Dihybrid Cross punnet square for TTPP and TtPp the four on top would be (TP TP TP TP) and on the side would be (TP Tp tP tp)
Incomplete Dominance progeny phenotypes that are blends of parental phenotypes. Classic example is color in snapdragons (dominant red crossed with recessive white produce PINK)
Codominance multiple dominant alleles; ex BLOOD ( o = ii, A = IAIA or IAi, AB = IAIB)
Sex-Linked Recessive gene carried on X chromosome; ex hemophilia & color blindness
epistasis occurs when one gene masks or modifies the expression of an other gene
Pleiotrophy – single gene effects several phenotypic characteristics
Mutations in somatic cells => tumors, in gametes => transmitted to offspring; insertion, deletion, substitution; ex sickle-cell anemia
Pyrimidines CUT the PY; 1 ring *Because G is triple bonded to C, higher G/C content more stable *Nucleotides are H-bonded
Redundancy/ Degeneracy genetic code synonyms, multiple codons for same AA
nucleoside sugar+base
Protein Synthesis Replication => Transcription => Translation. DNA synthesis occurs during S-phase.
Ribosomes are assembled by the nucleolus.
Replication  of DNA => DNA synthesized in 5’=>3’;
Helicase, primase helicase unwinds double helix and an RNA polymerase called, primase begins replication
Transcription DNA => RNA (nucleus), mRNA has inverted complementary code, ex 5’ TCTTT 3’ mRNA would be 3’ AGAAA 5’ **principal site of the regulation of gene expression
Translation RNA => Protein (cytoplasm); mRNA translated to AA
exons nucleotide base sequences that are transcribed into mRNA proteins
Introns are removed during transcription; (exons = don’t exit)
mRNA carries complement of DNA from nucleus to ribosomes, least abundant RNA
tRNA brings AA to ribosomes during synthesis, recognizes AA and codons; in cytoplasm; smallest form of RNA
rRNA ribosomal RNA; most abundant form of RNA
Ribosomes two subunits; three binding sites: 1 for mRNA, 3 for tRNA
PCR technique makes multiple DNA copies in vitro
X-Ray diffraction most accurate way to discover molecular structures.
Polypeptide sequence initiation (AUG), elongation, termination (UGA UAG UAA)
Gene Regulation transcription enables prokaryotes to control metabolism
Inducible system require inducer for transcription
RNA polymerase binds to promoter structural genes transcribed
Repressor binds to operator structural genes NOT transcribed
Inducer binds to repressor no binding to operator => genes transcribed
Repressible system constant state of transcription unless corepressor- repressor complex present to inhibit
Bacteriophage virus that infects host bacterium; attachment/ adsorption => penetration/ eclipse=> lytic or lysogenic
Lytic virus phage DNA takes control of bacterium/ makes numerous progeny; bacterial cell bursts (lyses) releasing virons; these types of bacteriophage are called virulent; ALL HOST cells destroyed = evolutionary disadvantage
Lysogenic virus becomes integrated into genome in harmless way (provirus/prophage); cleverness is that every time the host reproduces itself the prophage is reproduced too
Techoic acids used for recognition and binding sites by bacterial viruses that cause infections
Created by: xeenie
 

 



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

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

If you've accidentally put the card in the wrong box, just tap 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