HS-LS3-2

Make and defend a claim based on evidence that inheritable genetic variations may result from: (1) new genetic combinations through meiosis, (2) viable errors occurring during replication, and/or (3) mutations caused by environmental factors.

  1. Brain

    Why boys face higher autism risk

    Boys develop autism at four times the rate seen in girls. Girls’ genes are better protected from the mutations linked to this brain disorder, data now suggest.

    By Laura Sanders
  2. Life

    Caught in the act

    Scientists observe some evolutionary speed demons as they adapt over the course of just a few years to new environmental conditions.

    By Alison Pearce Stevens
  3. Health & Medicine

    New source for healthy fats

    Scientists found a way to produce fish oil without harming a single fish.

    By Stephen Ornes
  4. Genetics

    A DNA Clue to Reading Troubles

    Scientists have identified a gene involved in a learning disorder called dyslexia.

    By Emily Sohn
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