What is DFNB1? DFNB1 is an inherited condition characterized by mild to profound hearing loss that is typically present from birth. In most cases, a person must have two variants in the GJB2 gene in order to have this condition. People with just one variant in the GJB2 gene are called carriers. They’re not expected… Continue reading Nonsyndromic Hearing Loss and Deafness, DFNB1
Psoriasis
What is psoriasis? Psoriasis is a chronic autoimmune condition most commonly characterized by itchy, discolored patches covered in silvery white flakes, called “scales,” that form on the skin. Psoriasis symptoms may come and go throughout life, and certain triggers can cause them to flare up. Psoriasis is not an infection and is not contagious. Psoriasis… Continue reading Psoriasis
Glaucoma
What is glaucoma? Glaucoma is a group of eye conditions that occurs when the nerve in the back of the eye (called the optic nerve) is damaged, most commonly due to high eye pressure. Optic nerve damage can cause gradual vision loss that may start as blind spots or loss of side (peripheral) vision and… Continue reading Glaucoma
Genetics and Weight
Do genetic factors influence your weight? Yes! The fit of your jeans is affected at least in part by your genes. Lots of research has shown that genetics not only impacts how much we weigh but also how much diet and exercise may make a difference. Our weight is the product of genetics, lifestyle, and… Continue reading Genetics and Weight
Widow’s Peak Hairline & Genetics
How it works It’s a common misconception that a particular dominant gene causes a widow’s peak. Like other traits that influence hair growth, various genes work together to help determine the shape of our hairlines. Some researchers believe that hair patterns are heritable, so a close relative with a widow’s peak may increase your chances… Continue reading Widow’s Peak Hairline & Genetics
Unibrows & Genetics
How it works No one is quite sure why our eyebrow hairs grow in particular patterns—or the reason why some people have unibrows. But initial findings offer some clues. The genetic link 23andMe researchers have identified more than 50 genetic variants associated with having a unibrow. Two of those genetic variants are in or near… Continue reading Unibrows & Genetics
Toe Length Ratio & Genetics
How it works Some people have a longer big toe, while others have longer second toes. Toe length ratio may be influenced by the amount of testosterone and estrogen present in the womb during early pregnancy. The genetic link 23andMe looks at 35 places in your DNA that can influence your toe length ratio, along… Continue reading Toe Length Ratio & Genetics
Sweet vs. Salty Taste Preferences & Genetics
How it works With each bite-or sip-our taste buds send signals to a brain area called the “primary gustatory cortex” that helps identify taste. Another area, the “orbitofrontal cortex”, helps judge whether you like these tastes. Other brain areas help us decide whether we want to keep munching or we’ve had enough. The genetic link… Continue reading Sweet vs. Salty Taste Preferences & Genetics
Stretch Marks & Genetics
How it works Stretch marks are a type of scarring that look like stripes on the skin and are commonly found on the hips, thighs, and abdomen. They often develop when the skin stretches during a quick period of growth, like during adolescence, pregnancy, or rapid weight gain. The genetic link 23andMe scientists identified 544… Continue reading Stretch Marks & Genetics
Irritable Bowel Syndrome
What is irritable bowel syndrome (IBS)? Irritable bowel syndrome, or IBS, is a disorder that impacts the large intestine. It causes symptoms like abdominal pain, cramping, bloating, gas, and changes in bowel movements, including diarrhea, constipation, or both. The cause of IBS is not well understood. Researchers think it may involve multiple related factors, including… Continue reading Irritable Bowel Syndrome
