What are traits? Physical Traits Acquired Traits Behavioral Traits

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Presentation transcript:

What are traits? Physical Traits Acquired Traits Behavioral 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

Allele An allele is an alternative form of a gene that 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

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

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

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)

Inherited Traits

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

Freckles (FF, Ff) No Freckles (ff) http://teach.genetics.utah.edu/content/heredity/docs/InventoryComplete.pdf

Curly (HH, Hh) or Straight (hh) http://teach.genetics.utah.edu/content/heredity/docs/InventoryComplete.pdf

Acquired Traits

Riding a bike

Reading

Walking