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  • Heredity: How did I get my brown hair?
  • How did I get my brown hair?
  • Heredity is when genetic traits are passed from one generation to the next. Mine came from my Mom and Dad.
  • You get one allele from each parent. They make your genes and they decide your traits.
  • Dominant genes will appear in the individual (AA, Aa). Recessive genes are hidden by the dominant genes (aa).
  • Because I have brown hair, I have the dominant gene for brown hair. Blonde would be recessive.
  • Homozygous genes (same) are either both dominant (AA) or recessive (aa). Heterozygous genes (different) have both a dominant and recessive gene (Aa).
  • We use a Punnett square to show what possible gene pairs parents can give to their offspring to determine their traits.
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