Epigenetics

Activation or deactivation of genes by environmental experiences throughout development

• turn on genes

• gene expression

• environmental factors

• gene markers

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

Which of the following is not a method for silencing a gene

• mRNA silencing

• DNA methylation

• Mutation of the gene

• Transcription factor blocking promoter region

How can a person's muscle cells have the same exact DNA sequences as their nerve cells even though the look and perform completely different?

• The two different cells become mutated

• The proteins expressed in each cell are different

• They actually have different DNA in the two types of cells.

• The genome of the different cells changes

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-4

A chemical modification of DNA that does not affect the nucleotide sequence of a gene but makes that gene less likely to be expressed.

• activators

• methylation

• acetylation

• proteins

Epigenetics refers to changes in:

• DNA sequence

• Gene structure

• Gene expression

• DNA frequency

Which factor can affect the epigenome?

• Diet

• Exercise

• Stress

• Aging

True or False: Epigenetic changes are permanent.

• True

• False

Protein molecules around which DNA is tightly coiled in chromatin

• histones

• casein

• nucleosome

• chromosome

Does the DNA loosen or tighten with acetylation?

• tighten

• loosen

• does nothing

Which of the following best describes epigenetics?

• Changes in DNA sequence

• Changes in gene expression without altering DNA sequence

• Mutations in genes

• Recombination of DNA