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
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. Allele - PowerPoint PPT Presentation
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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
•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
•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)