heredity n.
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Heredity - PowerPoint PPT Presentation


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Heredity. DNA . DNA stores all of the information that makes each of us who we are. Controls the traits we possess Trait=Physical Characteristic Examples include skin color, eye color, height, eye sight, hair color, etc. Heredity.

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Presentation Transcript
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DNA
  • DNA stores all of the information that makes each of us who we are.
  • Controls the traits we possess
  • Trait=Physical Characteristic
  • Examples include skin color, eye color, height, eye sight, hair color, etc....
heredity1
Heredity
  • Heredity= The passing of genetic material from parent to offspring.
  • Gene= Basic unit of heredity; a group of DNA
  • Inherited traits are controlled by genes
    • Example: eye color
  • Allele= Variation of a gene
    • Example: Blue eyes or Brown Eyes
asexual reproduction
Asexual Reproduction
  • Reproduction that occurs when one organism produces offspring with identical DNA as the parent
  • Advantage: Quick and only requires one organism to reproduce.
  • Disadvantage: All offspring are identical or “clones” of the parent, no genetic diversity
sexual reproduction
Sexual Reproduction
  • Reproduction that occurs between two organisms that result in the offspring getting DNA from both parents
  • Advantages: Greater genetic diversity
  • Disadvantages: Takes two organisms and more energy.
dominant and recessive alleles
Dominant and Recessive Alleles
  • In sexual reproduction, offspring receive one allele from each parent.
  • One allele is dominant to the other allele
  • The dominant allele is always expressed when present in an offspring
    • Example: Eye Color
    • Brown is dominant=B
    • Blue is recessive=b
    • If one brown allele is present the offspring will have brown eyes
punnet squares
Punnet Squares
  • Punnet Squares are used to predict the traits of the offspring between two parents based on their alleles.

Parent 1

Parent 2

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Punnet Squares continued

Parent 1

Parent 2

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Punnet Squares Continued

Parent 1

Parent 2

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Punnet Squares Continued

Parent 1

Parent 2

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Punnet Squares Continued

Parent 1

Parent 2

punnet squares continued4
Punnet Squares Continued

Parent 1

Parent 2

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Punnet Squares Continued

Parent 1

Parent 2