Gene

"Sometimes it's surprising. For example, the reason your company culture feels different in each office is the same reason identical twins express genes differently in different environments. Every translation will be grounded in mechanism, not metaphor."

"These signals activate certain genes and silence others through epigenetic modifications (chemical tags on DNA that control gene expression without changing the DNA sequence itself). Once a cell differentiates, it usually can't go back. A neuron can't become a liver cell."

"Pathways to transmit those signals internally (this information must reach the nucleus) 3. Mechanisms to halt division (turning off growth genes, activating inhibitor proteins) Without all three, you get uncontrolled growth. With them, you get sustainable, healthy, appropriate growth that sup..."

"The plant senses water pressure and light levels and builds different structures accordingly. The mechanism is gene regulation. Every cell in your body contains the same DNA - the same instruction manual. But a liver cell doesn't express the genes for making neuron..."

"...ronmental conditions. Sexual reproduction mixes genetic material to create diversity. Asexual reproduction clones proven designs rapidly. Horizontal gene transfer - acquiring capabilities from unrelated species - allows organisms to absorb DNA from their environment."