what are epigenetics
combination of genotype and enviroment that make up the phenotype
what do epigenetics do and how
determine wherther gene is expressed via switching the gene of or on
what two things turn the gene of
decreased actylation
increased mythelation
what that decreased acytelation and increase mythelation do that turns the gene of
prevent it from being transcibed
what is one way the gene can be switched off
increased mythelation
- mythl group binds to cytosine and guanine nucleotides
- preventing transcriptional factors from binding
- increase mythelation prevents more transcriptional factors from binding
- dna not transcribed
when talking about association of dna and histone what is the term for all of it combined
- chromatin
describe actylation
- when chromatin is acetylated , chromitin becomes less condensed
- dna can be more eaily transcribed
how does decreased acetlyation switch the gene off
- decreased acetylation means chromatin more condensed
- dna not easily transcibed
