Dominant vs. Recessive Alleles Video


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How many alleles are in a gene?

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1. How many alleles for brown eyes do you need if the brown eyes allele is dominant?

2. How many alleles for blue eyes do you need for it to show if the blue eye allele is recessive?

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About This Quiz & Worksheet

Alleles are components of genes that help determine physical characteristics. The quiz tests you on basic concepts regarding dominant and recessive alleles.

Quiz & Worksheet Goals

The quiz asks you to:

  • Identify how many alleles are in a gene
  • Explain how many alleles are needed for brown eyes if the brown eyes allele is dominant
  • Tell how many alleles are needed for blue eyes assuming the blue eyes allele is recessive
  • Describe why there are only a certain amount of alleles in a gene
  • Classify the allele for sickle cell

Skills Practiced

  • Making connections - use what you know about dominant and recessive alleles to understand how they impact one's physical appearance
  • Defining key concepts - verify that you understand fundamental concepts about dominant and recessive alleles in genes
  • Reading comprehension - ensure that you focus on the most essential information from the lesson in order to answer questions about the amount of alleles in genes

Additional Learning

Discover more about inheritance and genetics by viewing the lesson entitled Dominant vs. Recessive Alleles. The lesson objectives are as follows:

  • Understand Mendelian inheritance
  • Define terms including allele, dominant, and recessive
  • Use real-world examples to understand the impact of alleles on inheritance
  • Explain the role alleles play in certain genetic diseases and disorders