BOTANY
EPIGENETICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The gene is off.
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The gene is expressed.
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It is impossible to tell.
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The gene is on and off at various times.
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Detailed explanation-1: -The DNA is tightly wrapped around the histone and the gene is methylated. The protein DNA wraps around to form a nucleosome. These chemical tags inactivate or silence a gene. The term refers to the chemical tags that affect gene function and may be passed on through generations.
Detailed explanation-2: -DNA Methylation This chemical group can be removed through a process called demethylation. Typically, methylation turns genes “off” and demethylation turns genes “on.”
Detailed explanation-3: -Methylation of histones can either increase or decrease transcription of genes, depending on which amino acids in the histones are methylated, and how many methyl groups are attached.
Detailed explanation-4: -Effects of DNA methylation DNA methylation is an epigenetic modification, i.e., heritable change in DNA without any modifications to the sequence of DNA. It alters expression of a gene during cell differentiation and causes a change that is heritable.