Ch 20

Question 1

chromatin remodeling

Answer 1

in preparation for transcription, nucleosomes are altered by multi protein complexes

Question 2

chromomeres

Answer 2

expand into diffuse puffs during the course of development

Question 3

histone-acetyl transferases

Answer 3

add acetyl groups to the histone proteins

Question 4

histone deacetylases

Answer 4

remove acetyl groups for the histones

Question 5

DNA methylation in mammals is responsible for

Answer 5

imprinting, in which the expression of the gene is controlled by its parental origin

Question 6

proteins that repress transcription

Answer 6

have been shown to bind to methylated DNA

Question 7

regions of mammalian genomes containing repititive sequences are

Answer 7

methylated

Question 8

inactive X chromosome in mammalian females

Answer 8

is extensively methylated

Question 9

Epigenetics

Answer 9

study of inherited changes in the phenotype or gene expressions caused by mechanisms other than changes in the underlying DNA sequence

Question 10

DNA methyltransferases

Answer 10

add methyl groups to DNA