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Commune with Jeff Krasno

553. Why Do Giraffes Have Long Necks?

Commune with Jeff Krasno

Commune Media

Health & Fitness, Society & Culture

4.6654 Ratings

🗓️ 19 March 2024

⏱️ 44 minutes

🧾️ Download transcript

Summary

In this episode, Jeff dives into epigenetics, the study of how genes express themselves in relation to behavior and environment. The good news: You are not a fixed genetic entity with a sealed fate but rather a fluctuating process changing in relation to your “exposome.”

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Transcript

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0:00.0

Welcome to the Commune podcast. My name is Jeff Krasno. Today I will explore the concept of epigenetics.

0:15.4

Now the term epigenetics gets used in a couple different contexts. It can refer to the study of how genes express themselves

0:23.5

differently in relation to behavior and to the environment. And the term is also used to refer to the

0:33.1

transgenerational inheritance of acquired traits. And in both contexts, epigenetics cast a shadow

0:42.3

on our conventional understanding of genetics, genetic determinism, and evolution.

0:50.2

Now, epigenetics along with the emerging fields of neuroplasticity and the microbiome are pointing

0:57.8

to a new understanding of the human organism, not as a fixed entity with a sealed fate, but as a

1:07.4

fluctuating process, changing in relation to its exosome, the foods we eat, stress,

1:16.5

our relationships, environmental toxins, even our feelings, and our thoughts.

1:21.8

Okay, so let's start to explore epigenetics by going back some 70 years. So in 1953,

1:32.2

James Watson and Francis Crick barged into the Eagle Pub in Cambridge, England, and

1:38.6

rashly proclaimed that they had discovered the secret of life. Now, there was justifiable reason to enjoy a pint

1:48.3

or three for Watson and Crick had unearthed the structure of DNA, the chemical that encodes

1:58.4

instructions for the building and replication of life.

2:04.2

Now, Watson and Crick proposed that the DNA molecule was made up of two chains of nucleotides

2:12.1

paired in such a way to form a double helix.

2:17.4

This spiral staircase-like structure explained how the DNA molecule

2:23.1

could replicate itself during cell division, enabling organisms to reproduce themselves with amazing

2:30.4

accuracy, except for the occasional mutation.

2:35.5

This monumental discovery propelled biology for five decades on a quest to study and unpack the

2:45.9

basic building blocks of life.

2:49.3

It anchored a paradigm that envisioned life as fixed, predetermined by the

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