Environmental factors that can affect gene expression can include:
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Temperature: Changes in temperature can influence how genes are expressed, as certain proteins may become activated or inactivated under different thermal conditions.
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Nutrient Availability: The availability of nutrients can determine the metabolic pathways that are activated and thus affect which genes are expressed.
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Chemical Exposure: Exposure to certain chemicals, including pollutants and toxins, can lead to changes in gene expression, often through mechanisms such as methylation or histone modification.
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Light: For many organisms, particularly plants, light can trigger responses that lead to changes in gene expression, such as flowering.
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Stress Factors: Physical stressors (like UV radiation) or biological stressors (such as infections) can lead to altered gene expression patterns as the organism responds to these challenges.
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Social Interaction: In many social animals, the presence or absence of certain social cues can alter hormonal levels and subsequently influence gene expression.
If you would like more information on a specific environmental factor or its impact on gene expression, please let me know!