What does it mean for a trait to be “X-linked”?

What is the purpose of today’s lab?

The number of adipose cells is essentially the same in all people, regardless of obesity.

This sweat is produced by the 

What is the large brown cell shown here at the bottom?

Tattoos can fade over time.  What is one reason for this?

What causes these goose bumps?

Vasoconstriction of the skin 

Facial expressions are produced by: 

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