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Heredity

Heredity. How would you describe yourself so that someone would recognize you? What traits make you unique and different from others?. Cornell Notes. A quality or characteristic that describes something. Physical Traits: Can be seen by others Ex: Eye color, hair color, height, left handed.

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Heredity

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  1. Heredity • How would you describe yourself so that someone would recognize you? • What traits make you unique and different from others?

  2. Cornell Notes A quality or characteristic that describes something. • Physical Traits: Can be seen by others • Ex: Eye color, hair color, height, left handed

  3. Hand Clasp Right over Left?

  4. What do these words mean? Dominant and Recessive

  5. Cornell Notes most important, powerful, or influential tending to go backward or recede

  6. Cornell Notes dominant gene recessive gene

  7. Dimples (DD, Dd) No Dimples (dd)

  8. Detached (EE, Ee) or attached (ee) Earlobes

  9. Freckles (FF, Ff) No Freckles (ff)

  10. Can Tongue Roll (TT, Tt) or Can’t (tt)

  11. Normal (BB, Bb) Color Blindness (bb) Can you see the number inside the circle? If you cannot, you may be colorblind

  12. What traits do you have? • Work with your partner and help each other identify what traits you have. • Under observation, record the trait you have • Next, identify if your traits are Dominant or Recessive. • When done, answer the “Think Critically Questions.” • Exceeds: circle other traits that you express

  13. What traits do we have in common?

  14. Cornell Notes

  15. Dominant or Recessive? A trait determined by a dominant gene Dimples Homework: Survey family genetic traits! A trait determined by a recessive gene Brown eyes Red hair Attached earlobes

  16. Right (RR, Rr) or Left (rr) handed?

  17. Curly (HH, Hh) or Straight (hh)

  18. Cleft Chin (CC, Cc) or No Cleft (cc)

  19. Widow’s Peak (WW, Ww) or Straight (ww)

  20. Allergies (AA, Aa) or No Allergies (aa)

  21. What are traits? • Physical Traits • Can be seen by others • Eye color, hair color, height, left handed • Acquired Traits • Learned skills • Playing a sport, riding a bike, playing a musical instrument • Behavioral Traits • Instinctual actions • Nest building and migration

  22. Review Terms Used in Modern Genetics • Genotype • The particular alleles (genes) an individual carries • They are inherited from your biological parents • Genes control your traits • Phenotype • An individual’s observable traits • What people can SEE when they look at you

  23. Review Terms Used in Modern Genetics • An individual with non-identical alleles of a gene is heterozygous for that gene • Examples: Bb, Tt, Aa • An individual with identical alleles of a gene is homozygous for that gene • Examples: BB or bb, TT or tt

  24. Terms Used in Modern Genetics • An allele is dominant if its effect masks the effect of a recessive allele paired with it • Capital letters (A) signify dominant alleles; lowercase letters (a) signify recessive alleles • Homozygous dominant (AA) • Homozygous recessive (aa) • Heterozygous (Aa)

  25. Data • We will now record our class data and graph our results • Does our data support which genes are dominant and which genes are recessive? • What about the whole 7th grade?

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