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Punnett squares and genetics quiz

This quiz helps 9th-grade students practice genetics vocabulary, set up Punnett squares, and calculate probabilities of offspring traits through multiple-choice and short-answer questions. It reinforces understanding of genotype, phenotype, and inheritance patterns.

By Edform · Biology · Grade 9 · Published Oct 15, 2026 · New

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Questions

  1. Which term describes an organism with two identical alleles for a trait?
  2. In a Punnett square, what do the letters outside the boxes represent?
  3. Which of the following are examples of phenotypes?
  4. A heterozygous genotype always shows the dominant phenotype.
  5. If a plant with genotype Tt is crossed with another Tt plant, what is the probability of getting a tt offspring?
  6. Select all terms that describe possible genotypes.
  7. A Punnett square can be used to predict the probability of offspring traits.
  8. What is the term for the genetic makeup of an organism? (one word)
  9. If two heterozygous parents (Rr) are crossed, how many out of 4 offspring are expected to show the dominant phenotype?
  10. Fill in the blank: An allele that is masked when a dominant allele is present is called ________.

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