Chapter 10 -2

Question 1

200 different cell types each only express ?% of genes at a given time.

Answer 1

5-10

Question 2

What are the 2 parts of Control Transcription?

Answer 2

DNA packaging & DNA Methylation

Question 3

What happens in DNA packaging?

Answer 3

Chromatin is tightly wound & bound to histone proteins

Question 4

What does DNA packaging limit?

Answer 4

access for transcription

Question 5

What controls access in DNA packaging?

Answer 5

histone acetylation

Question 6

What happens in DNA methylation?

Answer 6

methyl groups turn off some parental genes

Question 7

What does DNA methylation contribute to?

Answer 7

epigenetic inheritance

Question 8

What encourages X chromosome inactivation in each cell in female mammals?

Answer 8

DNA methylation

Question 9

What do regulatory genes do?

Answer 9

enhance binding sites and interact with activators or repressors

Question 10

What are regulatory genes?

Answer 10

non coding DNA control elements: upstream and downstream of a gene.

Question 11

What do master regulatory genes do?

Answer 11

controls activity of other genes and determines pattern formation

Question 12

Master regulatory genes are?

Answer 12

homeotic genes (1 class)