Do hair genes come from mom or dad?

Hair genes come from both the mother and the father. Many people think hair traits only come from the mother's side, but this is not true. Both parents share genetic information with their children.

For example, a child may get curly hair from the father, hair color may come from the mother, and hair thickness can come from both sides. Each parent gives half of their DNA to the child, which means hair traits are usually a combination of both families.

How hair color is passed down

Hair color depends on pigments called melanin. Genes control how much melanin your body makes, and different amounts create different hair colors.

Children may not always have the same hair color as their parents. Sometimes grandparents' genes also appear. This is why two dark-haired parents can sometimes have a blonde-haired child.

Why some people have curly hair

Hair texture is also controlled by genetics. Your genes decide the shape of your hair follicles.

• Round follicles usually create straight hair.
• Oval follicles often create wavy hair.
• Curved follicles usually create curly hair.

Curly hair genes can be stronger than straight hair genes in some families. That is why one parent with curly hair may pass curls to their child.

Can hair thickness be inherited?

Yes, hair thickness is strongly connected to genetics. Some families naturally have thick and full hair, while others have fine hair.

Genes affect hair strand size, hair density, and hair strength. Nutrition and health also matter, but genetics play the biggest role.

Where does baldness come from?

Hair loss and baldness can also run in families. Male pattern baldness is one of the most common inherited conditions.

Many people believe baldness only comes from the mother's side. This idea started because one baldness-related gene is found on the X chromosome from the mother. However, scientists now know that baldness depends on many genes from both parents. Lifestyle, stress, age, and hormones also affect hair loss.

Why siblings have different hair

Brothers and sisters may look different because every child gets a different mix of genes.

For example, one child may have curly hair while another may have straight hair. One may have dark hair while another may have lighter hair. Even twins can sometimes have slight hair differences because of environmental factors.

Can hair change over time?

Yes, hair can change during life. Many babies are born with one hair color and later develop another color as they grow older.

Hair may also change because of age, hormones, health conditions, stress, and diet. Some people's hair becomes curlier or straighter over time.

The role of ethnicity in hair genetics

Hair genetics are also connected to family background and ethnicity. Different groups around the world often have common hair traits.

These patterns developed over thousands of years through genetic changes.

How scientists study hair genetics

Scientists study DNA to learn more about hair traits. Modern research helps experts understand hair growth, hair diseases, early hair loss, and hair color changes. DNA testing can even predict some hair features before a baby is born.

Can you change genetic hair traits?

You cannot fully change your natural genetics, but you can change your hairstyle and hair appearance.

People often use hair dye, hair straightening, curling tools, hair treatments, and hair transplants. These methods change the look of hair but not the genetic code itself.

Best ways to care for your hair

Even if genetics control your hair type, good care is still important.

• Eat healthy foods.
• Drink enough water.
• Avoid too much heat styling.
• Use mild shampoo.
• Trim hair regularly.
• Protect hair from sun damage.

Good habits can keep your hair healthier and stronger.

Frequently asked questions

Why this matters for your hair journey

Understanding your hair genetics helps you make smarter choices about styling, care, and even extensions. At ShineTress, we work with clients of all hair types—fine, thick, curly, straight, and everything in between. Our premium services, including tape-in extensions and microlinks, are designed to enhance your natural beauty while respecting your hair's unique genetic makeup.

Whether you are embracing your natural texture or looking for a change, the right knowledge and the right professionals make all the difference.