epigenetics

Question 1

what is epigenetics

Answer 1

heritable changes in gene function without changes to the dna sequence

Question 2

how does Si RNA prevent translation

Answer 2

enzymes cut large double stranded molecules of RNA into smaller sections called small interfering RNA (siRNA)
one of the two siRNA strands combines with an enzyme
siRNA molecule guides the enzyme to the mRNA molecule by pairing up its bases with the complementary ones on the mRNA molecule
enzyme cuts mRNA
mRNA no longer capable of being translated into a polpeptide