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Transgenerational epigenetic inheritance i … Transgenerational epigenetic inheritance in plants involves mechanisms for the passing of epigenetic marks from parent to offspring that differ from those reported in animals. There are several kinds of epigenetic markers, but they all provide a mechanism to facilitate greater phenotypic plasticity by influencing the expression of genes without altering the DNA code. These modifications represent responses to environmental input and are reversible changes to gene expression patterns that can be passed down through generations. In plants, transgenerational epigenetic inheritance could potentially represent an evolutionary adaptation for sessile organisms to quickly adapt to their changing environment. In eukaryotes, negatively-charged DNA is wrapped extremely tightly around positively-charged proteins, called histones, to form chromatin. Since the DNA is wrapped so tightly, it is inaccessible to transcription enzymes that function to copy the DNA into RNA (See: Central dogma of molecular biology). The inaccessible DNA must be unwound to be transcribed into RNA. The mechanism by which the DNA can be unwound is called chromatin remodeling. Chromatin remodeling is one apparatus through which epigenetics acts. apparatus through which epigenetics acts.
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| rdfs:comment |
Transgenerational epigenetic inheritance i … Transgenerational epigenetic inheritance in plants involves mechanisms for the passing of epigenetic marks from parent to offspring that differ from those reported in animals. There are several kinds of epigenetic markers, but they all provide a mechanism to facilitate greater phenotypic plasticity by influencing the expression of genes without altering the DNA code. These modifications represent responses to environmental input and are reversible changes to gene expression patterns that can be passed down through generations. In plants, transgenerational epigenetic inheritance could potentially represent an evolutionary adaptation for sessile organisms to quickly adapt to their changing environment.ickly adapt to their changing environment.
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Transgenerational epigenetic inheritance in plants
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