Chapter 10 -2 Flashcards Preview

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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

Master regulatory genes are?

homeotic genes (1 class)