Hello, I'm an expert in genetics and human biology. Let's delve into the topic of hair and eyelash color.

Eyelash color is determined by the same genetic factors that influence the color of the hair on our heads. While it's common for people with blonde hair to have blonde eyelashes, it's not a hard and fast rule. The melanin pigment in our bodies, which is produced by cells called melanocytes, is responsible for the color of our hair, skin, and eyelashes. There are two types of melanin: eumelanin, which is brown or black, and phaeomelanin, which is yellow or red. The combination and concentration of these melanins determine the final color we see.

Now, when it comes to people with blonde hair, they typically have a lower concentration of eumelanin, which can result in lighter-colored hair. However, the eyelashes might not always reflect the same level of pigmentation due to the specific distribution of melanocytes in that area. It's entirely possible for a blonde-haired individual to have darker eyelashes if the melanin production in the eyelash follicles is higher.

So, to answer your question: While it's common for people with blonde hair to have blonde eyelashes, it's not a guarantee. The genetic control of melanin production can lead to variations in eyelash color even among blonde-haired individuals.

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Many people who have naturally blonde hair on their scalp, have darker (or darker-appearing) eyebrows. The same applies for body hair. Many who have light blonde hair on their scalp, have darker/brown eyebrows, eyelashes (sometimes with blonde ends), lighter hair on their arms but dark hair on their legs.read more >>