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Understanding Traits: Physical, Acquired, and Behavioral Characteristics

Traits are characteristics that define individuals and can be classified into physical, acquired, and behavioral categories. Physical traits, such as eye color, hair color, and height, are visible to others. Acquired traits include learned skills like playing sports or musical instruments. Behavioral traits encompass instinctual actions, such as migratory patterns in animals. Alleles are alternative forms of a gene located on chromosomes, influencing an individual's genotype and phenotype. Understanding these concepts helps unravel the complexities of heredity and traits in living organisms.

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Understanding Traits: Physical, Acquired, and Behavioral Characteristics

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Presentation Transcript

  1. 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

  2. Allele • An allele is an alternative form of a genethat is located at a specific position on a specific chromosome. • A,a,B,b …. • Genotype • The particular alleles (genes) an individual carries • They are inherited from your biological parents • Genes control your traits • Example: Aa or aa

  3. Phenotype • An individual’s observable traits • What people can SEE when they look at you • Example: Curly hair

  4. 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

  5. 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)

  6. Inherited Traits

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

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

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

  10. Acquired Traits

  11. Riding a bike

  12. Reading

  13. Walking

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