All the cells in an organism have the exact same genetic sequence. What differs across cell types is their ...

Gender identity refers to a person’s internal sense of their gender. Gender expression refers to how people may convey their gender to others through behavior and appearance. Gender exists on a broad ...

How is it that your body with all of its specialized organs developed from a single cell? Scientists are exploring how gene expression patterns and their timing regulate cell differentiation. Today, ...

Thoughtful questions often prompt thoughtful analysis and recently a series of questions from a reader regarding "micro-expressions" had such an effect on me. His questions made me stop and think ...