We may be as different as snowflake cookies, but a lot of the recipe is baked in! DNA: 30% – 60% of our personality is loosely hardcoded, with the remaining personality flavor coming from our environment, free-will choices, relationships, and experiences.
The interesting bit here is that the genetic component of “personality” involves a staggering 700 genes, each contributing in small ways to the overall picture of “who we are.”
The “Big Five” personality traits – neuroticism, extraversion, openness to experience, agreeableness, and conscientiousness – have been the focus of a bunch of genetic research: What are the biological underpinnings of our personalities?
Variations in genes like DRD4 and DRD2 have been linked to novelty-seeking behavior, “What dat?! Ooo! That would be fun! I don’t recognize that food (IS it food?) – let me stick it in my mouth and see what it tastes like!”
The serotonin transporter gene (5-HTTLPR) has been associated with neuroticism and anxiety-related traits. Other genes, such as KATNAL2, PCDH15, and WSCD2, have been connected to traits like discipline, caution,
…and sociability, “Hi there what’s your name, where do you live, what’s your favorite color, do you like me?“
That’s nuts. Genes?!
But! Also proven: genes are not destiny. Our personalities and futures are not set in stone. Studies have shown that the most significant changes often occur between ages 20 and 40, and documented major changes of life and destiny in one’s 70s or later. This malleability proves the ongoing interplay between our genetic predispositions — and our life experiences, relationships, and choices.
Researchers have also found genetic correlations between personality traits and mental health conditions. There’s a strong overlap between genes associated with neuroticism and those linked to depression and anxiety.
Our DNA provides a a bit of the goopy cookie cutter dough for our personalities, but it’s our experiences, choices, and environment that determine our destiny. We have the power to shape our own stories within the broad fuzzy boundaries our colorful genes provide.
Pretty cool.
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Simon Maechling
Fish DNA, Tomato DNA, or Lab DNA.
Is there a difference?
DNA doesn’t carry any “signature” that reveals where it came from.
When the sequence is the same, the molecules are chemically and functionally identical, no matter their origin.
Let’s break it down with an example:
→ GCGGTCGTACTA from a fish.
→ GCGGTCGTACTA from a tomato.
→ GCGGTCGTACTA from a DNA synthesizer in a lab.
These sequences are exactly the same – and so are the molecules.
DNA is built on a universal structure: a sugar-phosphate backbone paired with four nucleotides (Adenine, Thymine, Guanine, and Cytosine).
Whether extracted from an organism or synthesized in a lab, identical sequences mean identical DNA.
Cells don’t care where DNA comes from.
Introduce any of these sequences into a cell, and the cell’s machinery will read and process it as if it were its own.
DNA speaks a universal language, and the instructions encoded in its sequence are all that matter.
Whether it originates in a fish, a tomato, or a lab, its structure and function are the same if the sequence matches.
