MICROANATOMY

Detailed explanation-1: -Environmental factors such as diet, temperature, oxygen levels, humidity, light cycles, and the presence of mutagens can all impact which of an animal’s genes are expressed, which ultimately affects the animal’s phenotype.

Detailed explanation-2: -Many bacterial gene regulatory circuits are controlled by temperature. Temperature-mediated regulation occurs at the level of transcription and translation. Supercoiling, changes in mRNA conformation and protein conformation are all implicated in thermosensing.

Detailed explanation-3: -Positive experiences, such as exposure to rich learning opportunities, and negative influences, such as malnutrition or environmental toxins, can change the chemistry that encodes genes in brain cells-a change that can be temporary or permanent. This process is called epigenetic modification.