Epigenetics Flashcards
1
Q
Epigenetics
A
Dna can be turned on and off
Chromotin wrapped around histones
Changes to enviroment can change gene that is expressed
Dna expression can be changed by
acetylation more genes are expressed
methylation less genes are expressed
2
Q
Acetylation
A
Atraches to a histone protein
Relaxes and unwinds some of the chromotins - more gene expression
3
Q
Gene expression
A
Dna > protein > product
4
Q
Methylation
A
Attaches to a CpG site (between a C and a G on the DNA strand)
Wraps dna tighter - less gene expression
5
Q
What causes gene expression (environment)
A
Temperature pH changes Toxins Diet Stress Physical activity
