“Cheetahs Are Extremely Inbred”: 50 Interesting Genetics Facts You May Have Missed At School

Depression can be genetic.

Two brown eyed parents can have a blue eyed child.

When you’re pregnant, bits of DNA from your baby invade your body and settle all over permanently - including in your brain. Researches found this by looking for male DNA in the brains of deceased 70 year olds. Interestingly, mouse studies have also shown that fetal cells within the mother have restorative properties and will rush to places like the heart, kidneys, lungs, liver if it’s injured and can even become cells that begin beating. One of the theories I have seen but I don’t know if anyone knows for certain if this is true is that these cells enter our bodies so a ‘host’ is less likely to reject the parasite baby.

Birthing identical twins is not an inherited trait. It’s random. Fraternal twinning is inherited, but only from mother to daughter. My MIL ‘took credit’ for me having identical twins because she had fraternal twin siblings. When I explained that genetics proved her wrong she was not having it!! 🤣

Gastrointestinal issues can be passed on by parents. They run in your jeans

Potatoes have more chromosomes than humans.

People with moles live longer. Something to do with telomeres.

Most of your DNA is just noise that never gets used, and a significant chunk of it contains echoes of ancient and prehistoric viruses that infected your ancestors.

I'm a geneticist with a mediocre master's degree in biology and currently pursuing a PhD in Bioinformatics. Here are some insights:

1. The accuracy of consumer and clinical genetic tests is often questionable due to the rapid pace of scientific advancements outpacing their application in the industry. The notable exceptions are information about Neanderthal ancestry (which is significant enough to have earned a Nobel Prize in Medicine) and a few critical mutations like the sickle cell variant and others related to blood.

2. Genetically, most humans are nearly identical, with differences being incredibly minute. This means that, barring age and sex, achieving success in various fields – whether it's social, intelligence, or physical appearance – is possible without genetic modifications.
Everyone likely has a unique genetic trait that gives them a significant advantage, however. This is currently identifiable only in a lab setting. Understanding your unique trait, which often involves the expression of certain molecules, might require professional scientific interpretation.

3. Many severe genetic diseases, such as insulin-dependent diabetes, are only about 50% determined by genetics. Factors like early developmental conditions, including a mother's diet during early pregnancy and infections, play a paramount role.

4. Despite common belief, Neanderthals were not a separate species but rather a part of the human family. For perspective, Europeans and the Khoisan people of South Africa have been genetically divergent for about 300,000 years, not much less than the 500,000-year divergence between humans and Neanderthals.

5. Factors beyond genetics, such as living in a highly controlled environment (like a prison), having access to specific nutrition, owning a car and a separate house, and engaging in mental activities like language learning, math, statistics, and team video games, can significantly impact personal development. Genetics helps us understand and appreciate the influence of these non-genetic factors.
The field of genetics is incredibly dynamic and continually evolving, offering many more fascinating insights.

Genetic chimera is arguably the most interesting condition. It is possible (and documented) for a woman to give natural birth but the baby not match her DNA test.

Essentially, 2 fertilized eggs merge at a very early stage and developing into a single organism. Different parts of the body comprised of obe or the other genome.

It's most commonly discovered in domestic animals that have unexplainable color combinations, often (but not always) divided symmetrically.

The mitochondria is the powerhouse of the cell.

Trauma can be inherited (look up transgenerational trauma).

So if you feel more sensitive than most people it might be because your grandma experienced something horrible.

On average it takes three generations to heal a trauma if I remember correctly. But only if properly treated and the parents do not retraumatize their kids with their unconscious trauma-responses. This way unhealthy behaviors would become the norm and eventually become genetically preferred automatic behavior for future generations.

Red hair and blue eyes is the rarest hair/eye colour combination

Not sure what gene but Redheads can take more pain then others also require more anesthesia.

40-50% of our DNA is the same as cabbage.

All people with blue eyes are descended from the same person

One in 40 Ashkenazi Jewish women has a BRCA gene mutation. Mutations in BRCA genes raise a person's risk for getting breast cancer at a young age, and also for getting ovarian and other cancers. That is why Ashkenazi Jewish women are at higher risk for breast cancer at a young age.

Twins can have different fathers.

Pregnancy can alter your DNA as you create a new life. Allergies can appear or disappear, hair texture/colour can change.

There are more combinations than just XX and XY.

And some of the variations have no outward signs, so you could have one of them and have no idea without genetic testing.