We are independent & ad-supported. We may earn a commission for purchases made through our links.

Advertiser Disclosure

Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.

How We Make Money

We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently from our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What Causes DNA Changes?

By Wanda Marie Thibodeaux
Updated Mar 03, 2024
Our promise to you
TheHealthBoard is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At TheHealthBoard, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

DNA changes occur primarily because of natural errors that occur during the DNA replication process. They also can happen when one or more environmental factors act on the DNA. DNA changes are known as mutation, regardless of their origin.

All DNA is made up of four different bases: thymine (T), cytosine (C), adenine (A) and guanine. These bases bond together in what are known as base pairs. Along with sugar and phosphate molecules, these pairs form the nucleotides that make up the double helix DNA strand, and differences in base pair sequences is what creates genetic variance.

Normally, when DNA is replicated, the process begins with a protein called DNA helicase. This protein breaks the bonds between the bases, thereby separating the DNA molecule into two strands. A second protein, DNA polymerase, copies each single strand of DNA so that a new double-stranded DNA molecule can be formed. A mistake in the copy happens about once every billion bases or even less frequently.

As the natural DNA replication process shows, DNA requires the chemical bonds between the four primary bases to be stable. Some chemicals and other environmental factors, such as radiation, have the ability to alter the nucleotide bases so they mimic other nucleotide bases. If this happens, when the DNA replicates, the altered base essentially gets mistaken for a different base. The result is that the bases pair incorrectly, and a mutation occurs.

Most evolutionists, perhaps the most famous of whom was Charles Darwin, believed that species adapt based on DNA changes. The theory is that genetic mutations that are beneficial eventually will become common. For example, a genetic mutation might have led some giraffes to develop their famously long necks. Those with longer necks might have better access to food higher up and therefore might have been more likely to survive and pass on the mutated gene.

Even though some DNA changes can be beneficial, many are not. Cancer, for example, one of the most notable examples of DNA mutation, is a leading cause of death in many places. For this reason, many scientists have devoted their efforts to learning more about the DNA replication process and how to treat genetic conditions through gene therapy. Knowledge about DNA changes also creates some controversy, such as with the abortions of fetuses who test positive for certain genetic diseases. Environmental and health advocates also have studied the effects of chemicals that people make and have struggled to regulate the substances and practices that have been shown to cause DNA-related health problems.

TheHealthBoard is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.

Discussion Comments

By turquoise — On May 18, 2012

@burcidi-- Okay, so if I understand this right, DNA changes due to two types of factors- natural environmental factors and unnatural mutagens. Am I right? When I say natural environmental factors, I mean the DNA changes that occur in response to human evolution and needs. And unnatural mutagens are things like chemicals, viruses and radiation.

So then, do we know how the evolutionary DNA change takes place? I understand DNA replication. DNA replicates in a sort of automatic mode. It replicates whichever gene is there, whether it is mutated or not. But how can the environment, things like climate or food source, initiate a gene mutation?

It's easier to understand mutagens like viruses and radiation. They enter the body and act on the genes directly. The evolutionary change in DNA is what confuses me.

By burcidi — On May 18, 2012
@anamur-- Of course they can, and in fact, they should. Just as Charles Darwin argued, in relation to natural selection, some DNA changes take place to better adapt humans to their environment. And when these DNA mutations are dominant, they will pass on to the offspring. If they are recessive, they may not be expressed for several generations.

In order to pass on to offspring however, the mutation has to affect the germ cells which take part in the production of reproductive cells -- sperm and eggs. If these cells are affected, the fertilized egg will carry the DNA carrying the mutation. If they are not affected, then they will not.

So if a mother's DNA experiences mutation due to radiation before conceiving a child, and this mutated DNA gets replicated for the egg which is fertilized, the mutation will also exist in the child.

By serenesurface — On May 17, 2012

Can DNA change become hereditary?

I think that they can because I read something along these lines about keratosis pilaris. The other name for this condition is chicken skin. It's when the skin carries too much protein and the hair follicles become plugged, giving skin the appearance of goosebumps.

I have this, and so does my mom and dad. But from what I read, keratosis pilaris is the result of a genetic mutation and it is hereditary. Either I misunderstood, or DNA changes can be passed down to offspring.

Can anyone clarify?

TheHealthBoard, in your inbox

Our latest articles, guides, and more, delivered daily.

TheHealthBoard, in your inbox

Our latest articles, guides, and more, delivered daily.