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9 August, 23:31

What would be required to prove that a phenotype is caused by an epigenetic change? A-The phenotype must be heritable with modified chromatin and an unaltered nucleotide sequence. B-The phenotype must be unexplained by known genetic mechanisms. C-The phenotype must be the result of a nucleotide change that is present in one gender but not the other. D-The phenotype must be passed to progeny only through the maternal DNA. E-The phenotype must be reversible in the presence of mutagenic compounds.

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  1. 10 August, 01:54
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    Option (A).

    Explanation:

    Epigenetics may be defined as the study of the heritable phenotype changes that do not change the sequence of DNA. The gene activity or gene expression changes in epigenetics. Environment may also brings the changes in gene expression.

    The change in phenotype of the individual must be inherited in epigenetic changes. The chromatin must be modified but the nucleotide sequence remains unaltered in epigenetic changes.

    Thus, the correct answer is option (A).
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