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Inheritance and Variation

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  • Define variation
    The way members of the same species differ
  • Define fertile
    An organism capable of producing offspring
  • What do genes code for?
    Traits (characteristics)
  • What can affect your genetic characteristics?
    Environment
  • Describe the shape of DNA
    Double helix
  • How many parents does sexual reproduction require?
    Two (2)
  • What does DNA stand for?
    Deoxyribonucleic Acid
  • What is sexual reproduction?
    The fusion of two gametes to form a zygote
  • Is variation seen in sexual reproduction?
    Yes (offspring will have combination of both parents characteristics, being similar, but different to both parents = variation)
  • What are non-inherited traits? Give one example.
    Traits that are not inherited but learned (example: ride a bike, learn new language, paly instrument)
  • What is asexual reproduction?
    Involves one parent with the offspring being genetically identical to the parent.
  • Define species
    A group of organisms that can breed with each other to produce fertile offspring
  • DNA was discovered by who? (2 names)
    Watson and Crick
  • What is a Gene?
    Sections of DNA that code for a particular trait
  • What are gametes? How many chromosomes in each gamete?
    Sex cells (egg and sperm cells)
  • What are the two types of variation?
    Genetic (Inherited) AND non-inherited (acquired)
  • Where is DNA found?
    In chromosomes in the nucleus of a cell
  • Is there variation with asexual reproduction?
    No
  • Every cell in the body contains _________ chromosomes (____ pairs)?
    46 chromosomes (23 pairs)
  • What is a chromosome?
    Chromosomes consist of DNA and protein
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