Dominance, Incomplete Dominance and Codominance – Worksheet


Worksheet to accompany the online lesson Dominance, Incomplete Dominance and Codominance.

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dominance incomplete dominance and codominance worksheet


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Worksheet Contents

  • This worksheet covers:
  • Dominance
  • Dominant and recessive alleles
  • Dominant and recessive phenotypes
  • Incomplete dominance
  • Codominance
  • Writing genotypes
  • Determining phenotypes
  • Includes:
  • Unit outline.
  • Cloze activity (fill in the blanks).
  • Short-answer questions.
  • Extension questions.
  • Activity.
  • Teacher version containing complete answers.
  • Aligned to the Australian Year 10 Science curriculum.
  • 7 pages.

Learning Outcomes

  • By the end of this worksheet students will be able to:
  • ☑   Describe dominant and recessive inheritance.
  • ☑   Define ‘dominant allele’ and ‘recessive allele’.
  • ☑   Define ‘dominant phenotype’ and ‘recessive phenotype’.
  • ☑   Describe incomplete dominance.
  • ☑   Describe codominance.
  • ☑   Write genotypes for dominance, incomplete dominance and codominance.
  • ☑   Predict phenotypes of homozygotes and heterozygotes for dominance, incomplete dominance and codominance.


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