molecular structure of heritable material Flashcards
He primary worked with phenotypes ? ? genotypes ? ? ?
tall
dwaf
AA, Aa, aa
Mendel laid foundation of modern genetics
- ?
- ?
law of segregation
law of independent assortment
principles of inheritance.. 3 questions.
how is info transferred from parent to offspring
what material holds info
how is the info converted from genotype to phenotype
the study of DNA and RNA structure and function =
molecular genetics
properties of genetic material:
- must contain info
- must be transmissible
- must be replicable
- must be variable
identification of DNA as genetic material: part 1
who in 1928 discovered Streptococcus pnumoniae
(smooth= capsule) lethal
(routh= no capsule) not lethal
Fredrick Griffith
identification of DNA as genetic material: part 1
heat killed smooth:
-?
-?
not lethal
no bacterial isolated from blood
identification of DNA as genetic material: part 1
heat killed smooth + live rough:
-?
-?
lethal
smooth bacteria in blood
identification of DNA as genetic material: part 1
- the smooth bacteria are alien robots that can’t be heat killed..?
- heat turned live smooth bac. to zombie bac. that then turned the rough bac. into smooth zombies?
- transformer hypothesis
- zombie hypothesis
Zombie Transformers:
_______ ______ were “transformed” to smooth by dead smooth bac.
rough bac.
genetic info transferred from one bac. to another
transformation
discovered in 1869 by Friedrich Miescher
-originally termed nuclein
nucleic acid structure
4 levels of complexity (nucleic acid structure)
nucleoties
stands
double helix
3D folding of double helix
the building blocks (phosphate+pentose sugars+nitrogenous base)
what are pentose sugars?
nitrogenous bases?
nucleotides
DNA and rna
purines–double ring & pyrimidines– single ring
nitrogenous bases:
DNA made of?
RNA made of?
A,G,C,T
A,G,C,U
nucleosides (just sugar and base)
- adenosine= ________+_________
- deoxyadenosine= _______ + ___________
adenine+ribose
adenine+deoxyribose
-phosphodiester bonds link ___________
strand is polarized 5’,3’ (explain)
nucleoties
5’ end has free phosphate
5’ to 3’ = 5’ beginning and 3’ is ending
DNA spirals go..
right handed clockwise
- short strands of DNA can bind in major groove
- T in short strand binds to AT
- C in short strand binds to GC
triplex DNA
- implicated in recombination
- potential to inhibit gene exp. of specific genes
- possible cancer treatment..
triplex DNA
Nucleotides make up ______ _______
RNA strands
transcribed RNA is _________ stranded
single
Mendel _________ phenotypes and _______ genotypes
thus, genotypes were represented as Aa or Tt
observed , inferred
what does SNP stand for
single nucleotide polymorphisms