In people with brown, black and blond hair, the gene, for the melanocortin-1 receptor, produces melanin.

在褐色头发、黑头发和金发的人群中，黑素皮质素受体基因(melanocortin - 1 receptor)能分泌黑色素。

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The 6-foot-1-inch blond model told a news conference Tuesday of the pain the row had caused her.

CNN: STORY HIGHLIGHTS

Heeringa is described as 5-foot-1, 110 pounds with blond hair, blue eyes and wearing wire-rimmed glasses.

CNN: Police: 'Grasping at straws' in Michigan kidnap case

Heeringa is described as 5 feet, 1 inches tall, 110 pounds with blond hair, blue eyes and wearing wire-rimmed glasses.

CNN: Search on for woman kidnapped from gas station