Genotype and phenotype

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Genotype and phenotype

  1. 1. Genotype and Phenotype What is the difference?
  2. 2. Review Words Characteristics – are the category of a trait –  Example – eye color, height, likes/dislikes Traits – the physical, social, and emotional qualities of an organism  Example – blue eyes, tall, hates carrots Dominant Trait – when a majority of an organism shows the trait.  Example – most pea plants show as tall Recessive Trait – when a minority of an organism shows the trait.  Example – few pea plants show as short Alleles – all the possible choices for a characteristic  Example – eye color – blue, brown, gray, green
  3. 3. Genotype How the genes code for a specific trait. If the trait is dominant it uses a capital letter  Example – Tall (T) Ifthe trait is recessive it uses the same letter but lower case  Example – short (t) Genotypes always have two letters – one for dad and one for mom
  4. 4. Types of genotype Purebred (homozygous) dominant – the genes only have the dominant trait in its code.  Example – Dominant Tall -- TT Purebred (homozygous) recessive – the genes only have the recessive trait in its code.  Example – Recessive short – tt Hybrid(heterozygous) – the genes are mixed code for that trait.  Example – hybrid Tall -- Tt
  5. 5. PhenotypeThe outward appearance of the trait.How an organism looksHow an organism actsHow an organism feels
  6. 6. Tricks to remembering the differencebetween Genotype and PhenotypeGenotype – deals with GENE CODE.Phenotype – deals with looks you can take a PHOTO with.

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