DNA is stable because it has a double helix structure that protects it from damage. Additionally, cells have repair mechanisms that fix any damage that does occur.
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Environmental factors such as radiation, chemicals, and temperature extremes can cause mutations in the genetic code. These mutations may lead to changes in the DNA sequence, potentially impacting an organism's traits and overall fitness. Additionally, factors like diet and exercise can influence gene expression and epigenetic modifications, altering how genes are turned on or off.
abiotic factors
Hair turning grey is a natural part of aging due to a decrease in melanin production. The front of the hair may turn grey first because it is more exposed to sunlight and environmental factors, which can accelerate the loss of melanin.
Height is a trait that can be influenced by both inheritance (genetics) and environmental factors such as nutrition and overall health. While genetics plays a significant role in determining a person's potential height, environmental factors during childhood and adolescence can also impact growth and final height.
Genetics is not affected by environmental factors.