Flashcards in Chapter 10 -2 Deck (12):
1
200 different cell types each only express ?% of genes at a given time.
5-10
2
What are the 2 parts of Control Transcription?
DNA packaging & DNA Methylation
3
What happens in DNA packaging?
Chromatin is tightly wound & bound to histone proteins
4
What does DNA packaging limit?
access for transcription
5
What controls access in DNA packaging?
histone acetylation
6
What happens in DNA methylation?
methyl groups turn off some parental genes
7
What does DNA methylation contribute to?
epigenetic inheritance
8
What encourages X chromosome inactivation in each cell in female mammals?
DNA methylation
9
What do regulatory genes do?
enhance binding sites and interact with activators or repressors
10
What are regulatory genes?
non coding DNA control elements: upstream and downstream of a gene.
11
What do master regulatory genes do?
controls activity of other genes and determines pattern formation
12