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Why does one chromosome result not describe every sex trait?

A chromosome result describes one part of sex development. Androgen insensitivity shows why hormone receptors also matter: cells can respond differently to the same hormonal signals, affecting particular physical traits.

5–7 min

Questions you could explore

  • How does following a signal from a gene to a receptor change the explanation?

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Health and the body

How does daylight set the body’s clock?

Feeling sleepy at night involves more than counting the hours since you woke up. Internal daily rhythms respond to outside cues, with light helping coordinate the body's sense of time.

3–5 min

How does daylight set the body’s clock?

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How does a vaccine give the immune system a memory?

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4–5 min

How does a vaccine give the immune system a memory?

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Health and the body

Why won’t an antibiotic treat a viral cold?

The word infection covers illnesses caused by very different organisms. An antibiotic that helps against certain bacteria has no matching target in the viruses that cause a cold.

2–3 min

Why won’t an antibiotic treat a viral cold?

Health and the body2–3 minThe word infection covers illnesses caused by very different organisms. An antibiotic that helps against certain bacteria has no matching target in the viruses that cause a cold.

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