### Understanding Epigenetics**Question:**Which of the following is true about epigenetics?**Options:**- ○ Alterations are permanent- ○ It "keeps track" of previous experiences- ○ It is not impacted by toxins in the environment- ○ Once DNA replicates, epigenetic effects disappear and the process must begin again **Question:**Which of the following is NOT true about the agouti gene?**Options:**- The gene can be methylated and unmethylated during an individual's life.- Methylated gene results in a brown coat.- Diet supplement can influence methylation.- Different amounts of methylation result in different fur pigmentation.

Epigenetic changes are genetic modifications that impact gene activity without changing the DNA sequences. For example DNA methylation that may cause repression of some genes. According to our guidelines we are supposed to do only first full question so kindly repost the remaining question as fresh question next time.1. Once DNA replicates epihenetic effects disappear and the process must begin again. Explanation Most epigenetic modification, by whatever mechanism, is believed to be erased with each new generation, during gameto-genesis and after fertilization. Epigenetic changes are impacted by lot of environmental factors including toxins. Epigenetic changes may not be permanent as some epigenetic changes can be added or removed in response to changes in behavior or environment. Thus epigenetic changes are reversible changes