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Genetic Inheritance

Genetic Inheritance. Free ear lobe: Dominant. Attached ear lobe: Recessive. Widow’s Peak: Dominant Trait. Recessive: Index finger same or larger than ring finger. Dominant: Index finger shorter than ring finger. Bent Thumb (hitchhiker’s thumb): Recessive trait.

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Genetic Inheritance

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  1. Genetic Inheritance

  2. Free ear lobe: Dominant Attached ear lobe: Recessive

  3. Widow’s Peak: Dominant Trait

  4. Recessive: Index finger same or larger than ring finger Dominant: Index finger shorter than ring finger

  5. Bent Thumb (hitchhiker’s thumb): Recessive trait

  6. Bent Little finger – bends towards the ring finger Dominant trait

  7. Mid-digit hair: Dominant trait

  8. Hand Clasp: Left thumb on top – Dominant

  9. Cleft chin (chin fissure): Dominant trait

  10. Freckles: Dominant Trait

  11. Dimples: Dominant Trait

  12. Tongue Rolling: Dominant Trait

  13. Long Palmar Muscle Those who are dominant have two tendons. Those who are recessive have three (or more) tendons. To determine: Palm up Clench your fist Flex your hand away from face Look and feel for three tendons. A middle tendon indicates the presence of the recessive long palmar muscle.

  14. PTC tasting (Tasting PTC, T, is dominant over the inability to taste it, t.) Chew a piece of PTC paper for a few seconds. If you can detect the bitter taste of PTC, you are T_

  15. Achondroplasia (form of dwarfism) - dominant

  16. Ptosis (one or more eyelids droop) : Dominant Trait

  17. Woolly Hair: Dominant

  18. Normal Fruit Fly Vestigial Wings (reduced and can’t fly): Recessive Trait

  19. Hairless trait: Recessive

  20. Hairy ears – Mystery trait! Use to be thought that it was sex-linked on Y chromosome

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