Grade 9Sciencequiz16 questions

Genetics

Grade 9: DNA and genes, inherited traits, variation, adaptation and evolution.

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Free to play. Teams answer on one screen; your phone is the remote. No student devices.

Questions

  1. Which molecule carries genetic information in cells?

    • ATP
    • DNA
    • Lipid
    • Starch
    Show answerDNA

  2. Which four bases are found in DNA?

    • A, T, C, G
    • A, T, C, U
    • A, T, U, G
    • A, U, C, G
    Show answerA, T, C, G

  3. In DNA, which base always pairs with adenine?

    • Cytosine
    • Guanine
    • Thymine
    • Uracil
    Show answerThymine

  4. A gene is a section of DNA that carries the code for making a protein. (True or false?)

    Show answerTrue

  5. Different forms of the same gene are called what?

    • Alleles
    • Chromosomes
    • Mutations
    • Nucleotides
    Show answerAlleles

  6. A person has two recessive alleles for a trait. What is their genotype called?

    • Codominant
    • Heterozygous
    • Homozygous dominant
    • Homozygous recessive
    Show answerHomozygous recessive

  7. Two heterozygous parents (Aa × Aa) have a child. What is the chance of an aa child, as a fraction? (Answer out loud)

    Show answer1/4

  8. How many chromosomes are in a normal human body cell?

    • 23
    • 44
    • 46
    • 48
    Show answer46

  9. A scar you get from an accident can be passed on to your children through your genes. (True or false?)

    Show answerFalse

  10. Which is an example of variation caused only by the environment?

    • A plant growing taller in sunlight
    • Blood group
    • Eye colour
    • Having dimples
    Show answerA plant growing taller in sunlight

  11. In which type of cells must a mutation occur to be passed on to children? (Answer out loud)

    Show answerSex cells (gametes)

  12. Which process produces genetically varied sex cells (gametes)?

    • Binary fission
    • Digestion
    • Meiosis
    • Mitosis
    Show answerMeiosis

  13. Who proposed that evolution happens by natural selection?

    • Charles Darwin
    • Gregor Mendel
    • Isaac Newton
    • Louis Pasteur
    Show answerCharles Darwin

  14. Individual organisms evolve during their lifetime; populations do not. (True or false?)

    Show answerFalse

  15. Bacteria become resistant to an antibiotic over time. Which process explains this? (Answer out loud)

    Show answerNatural selection

  16. A cactus has thick stems that store water. This feature is best called a what?

    • Adaptation
    • Fossil
    • Hybrid
    • Mutation
    Show answerAdaptation

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