HS-LS3-1

Ask questions to clarify relationships about the role of DNA and chromosomes in coding the instructions for characteristic traits passed from parents to offspring.

More Stories in HS-LS3-1

  1. Genetics

    Explainer: How DNA testing works

    Lots of companies will now test DNA from people and their pets. How do these gene-sequencing techniques work? We explain.

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  2. Genetics

    Explainer: What are genes?

    Genes are DNA regions that tell cells how to build proteins. But we have many more proteins than genes. And much of our DNA controls when genes turn on and off.

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  3. Genetics

    Your DNA is an open book — but can’t yet be fully read

    There are many companies that offer to read your DNA. But be prepared: They cannot yet fulfill all those promises you read in their ads.

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  4. Genetics

    Explainer: Why scientists sometimes ‘knock out’ genes

    How do we learn what a particular molecule does in the body? To find out, scientists often 'knock out' the gene that makes it. Here’s how.

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  5. Genetics

    Explainer: How CRISPR works

    Scientists are using a tool called CRISPR to edit DNA in all types of cells.

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  6. Genetics

    DNA tells tale of how cats conquered the world

    Ancient DNA study suggests that domesticated cats spread across the ancient world in two waves.

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  7. Archaeology

    DNA from African mummies tie these folk to Middle Easterners

    Ancient DNA extracted from 90 Egyptian mummies reveals genetic links to Greece and the Middle East.

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