Which of the following is true of epigenetic modifications?

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Epigenetic modifications of gene expression are irreversible, so cells are committed to their epigenetic fate following cell replication.

Epigenetic modifications change the DNA sequence in such a way as to make the regulatory DNA sequences more accessible to nucleosomes and to encourage weaker binding in these regions.

Epigenetic modifications remodel chromatin and are transmitted during cell division or reproduction.

During the process of epigenetic "memory," old histones are replaced with new histones that are passed to newly divided daughter cells.

 

asked May 26, 2013 in Genetics by GeneX ~Top Expert~ (7,947 points)
    

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Epigenetic modifications remodel chromatin and are transmitted during cell division or reproduction.

 

answered May 26, 2013 by GeneX ~Top Expert~ (7,947 points)



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