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Hereditary Traits

Hereditary Traits. A quick review of terms. Dominant a trait that will appear in the offspring if one of the parents contributes it Recessive a trait that must be contributed by both parents in order to appear in the offspring. A quick review contd. Genotype

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Hereditary Traits

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  1. Hereditary Traits

  2. A quick review of terms • Dominant a trait that will appear in the offspring if one of the parents contributes it • Recessive a trait that must be contributed by both parents in order to appear in the offspring.

  3. A quick review contd. • Genotype • This is the "internally coded, inheritable information" carried by all living organisms. This stored information is used as a "blueprint" or set of instructions for building and maintaining a living organism. • Phentotype • All the observable characteristics of an organism, such as shape, size, colour, and behaviour, that result from the interaction of its genotype with the environemnt. • The phenotype may change throughout the life of an individual because of environmental changes and the changes associated with aging.

  4. Ear lobes • Free (dominant) • Attached

  5. White Forelock • A white forelock is a patch of white hair, usually located at the hairline. • With (dominant) • Without

  6. Dimples • With (dominant) • Without

  7. Thumbs • Straight (dominant) • Curved

  8. Pinky finger • Straight • Bent (dominant)

  9. Mid-digit hair • With (dominant) • Without

  10. Red-Green Colour blind • Everyone should be able to read the number 12

  11. Those with normal color vision should read the number 8. Those with red-green color vision deficiencies should read the number 3. Total color blindness should not be able to read any numeral.

  12. Normal vision should read the number 29. • Red-green deficiencies should read the number 70. • Total color blindness should not read any numeral

  13. Normal color vision should read the number 5. • Red-Green color deficiencies should read the number 2.

  14. Normal color vision should read the number 45. • The majority of those with color vision deficiencies cannot read this number or will read it incorrectly.

  15. Tongue • Roll (dominant) • Unable to roll

  16. Now lets survey the class • How many: • Earlobes – attached, unattached • White forelock – with, without • Widows peak • Dimples • Thumbs – curved, straight • Pinky finger – straight, bent • Mid-digit hair – with, without • Red-green colour blind – yes, no • Tongue rollers – yes, no

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