Save
Upgrade to remove ads
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

Genetics vocabb

Genetics vocab

QuestionAnswer
Genetics the branch of biology that deals with 1)heredity & the expression of inherited 2)traits
Heredity transmission of traits from one generation to the next
Traits any detectable phenotypic variation of an inherited character (detectable ny visible, chemical, or molecular means)
Mendelian ideas Genes in Pairs, Dominant/Recessive, Segregation, Ind Assortment
genes in pairs genetic characters are produced by genes that exist in pairs w/in individual organisms
Locus physical location of a given gene
diploid containing 2 complete sets of chromosomes, one from each parent
allele gene copy, diploids have 2 alleles at every locus
Homologs 2N chromosomes of same length, same loci, same centromere location, maternal and paternal, A and a
Dominant/Recessive when 2 unlike alleles responsible for a single trait are present in a single individual one allele is dominant over the other
1) Principle of Segregation separation of homologs. During formation of gametes, the paired alleles separate (segregate) randomly so that each gamete receives one or the other. segregation ratios, all, 1:1, 1:2:1 AKA who knows if you'll be taller or shorter? its a toss up, random
2) Principle of Independent Assortment during the formation of gametes, segregating alleles assort (segregate) independently of each other AKA eye color has no relation to heighth, they are independent, have nothing to do with each other
Alleles do what, Loci do what? and, how many parts are there to a dihybrid cross? alleles segregate, loci assort, 16
dyad sister chromatids after replication, AA and aa. sisters are perfect copies, must be AA or aa, no Aa
mitosis condensation of sister chromatids
meiosis I and II I: reduces genetic content (DNA=1/2); II: generates variation:mechanism for Mendel's 2 principles
1st principle demonstrated when? Anaphase I: seperation of homologs AA and aa
2nd principle when? Metaphase I: produces a gamete with a mixture of the organism's maternal and paternal chromosomes
Epigenesis v. Pangenesis define epi Epigenesis: idea that we on a blueprint to build the final units-DNA(they weren't there to begin with); "de novo" development (of nothing).
Epi v Pangenesis Pangenesis:Darwin, theory that small, exact copies of body parts are transported by bloodstream to sex organs and are assembled into gametes
Sex limited a trait that is expressed in only one sex even tho both sexes can carry the allele, like testes, cock v. hen
sex influenced a trait whose expression is conditioned or influenced by the sex of the individual. CLUE ex: dominant in male, recessive in female
sex determination autosome- chromosome other than sex chromosome; sex chromosome-involved in sex detemination.
modes of sex determination Protenor: XX and XO; Lygaeus: XX and XY or ZZ and ZW
which is the homogametic sex? female: humans male: some fish, ALL moths, butterflies, birds, includes penguins and chickens*******
Holandric means sex linked/carried ON THE Y CHROMOSOME
sex linkage resulting from loci being on the sex chromosomes, reciprocal crosses will differ
epistasis interaction between 2+ loci that results in production of a single trait
Epistasis types and ratios Single Dominant Epistasis 12:3:1 Double Dominant Epistasis 15:1 Single Recessive Epistasis 9:3:4 Double Recessive Epistasis 9:7
Pleiotropy multiple phenotypic effects from a single gene (like, color and life together, ex. platinum foxes)
Penetrance proportion of genotypes that are actually expressed as the appropriate phenotype. ex. 80% penetrant- genetic screening, molecular markers
recessive lethal a lethal allele that is expressed only in the homozygote aka both copies are the lethal
dominant lethal lethal allele expressed in homo and heterozygote aka need only one copy to be dead
How Genes cheat (1)delayed expression: Huntingtons; (2) conditional lethal, environment affects it; also (3)incomplete penetrance is another factor
Created by: offlinefish
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