Read the text:
'Epigenetic modifications—such as DNA methylation and histone acetylation—alter gene expression patterns without modifying underlying nucleotide sequences. Environmental stressors like chronic malnutrition can induce stable epigenetic marks that persist across subsequent generations.'
The main idea is that...
Answer and explanation
Correct answer: A. Environmental factors can induce heritable changes in gene activity without altering DNA sequences
- Step 1: Epigenetics alters expression without changing base sequences, and environmental stress can cause transgenerational marks. Step 2. The central idea connects environmental triggers to heritable non-sequence modifications. Answer: Environmental factors can induce heritable changes in gene activity without altering DNA sequences. Why not the others: DNA sequence remains unchanged in epigenetic marks.
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