epigenetics

Question 1

what are epigenetics

Answer 1

combination of genotype and enviroment that make up the phenotype

Question 2

what do epigenetics do and how

Answer 2

determine wherther gene is expressed via switching the gene of or on

Question 3

what two things turn the gene of

Answer 3

decreased actylation
increased mythelation

Question 4

what that decreased acytelation and increase mythelation do that turns the gene of

Answer 4

prevent it from being transcibed

Question 5

what is one way the gene can be switched off

Answer 5

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

Question 6

when talking about association of dna and histone what is the term for all of it combined

Answer 6

• chromatin

Question 7

describe actylation

Answer 7

• when chromatin is acetylated , chromitin becomes less condensed
• dna can be more eaily transcribed

Question 8

how does decreased acetlyation switch the gene off

Answer 8

• decreased acetylation means chromatin more condensed
• dna not easily transcibed