Properties of Alleles


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question 1 of 3

Which of the following is NOT an example of a homozygous genotype?

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1. Consider the following experiment: A scientist determines that the number of dorsal spines of her experimental fish is determined by a single locus. She mates a fish with 1 dorsal spine with a fish of the same species with 2 dorsal spines. The mating produces ten fish, which all have 1 dorsal spine. Which of the following statements does not fit with this result?

2. What type of organism has two copies of every gene?

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About This Quiz & Worksheet

Focusing on what gives us our particular traits, this quiz and corresponding worksheet will help you gauge your knowledge of the properties of alleles. Quiz topics include examples of the homozygous genotype and how to solve a hereditary trait problem.

Quiz & Worksheet Goals

Use this printable worksheet and quiz to review the following:

  • Examples of a homozygous genotype
  • Hereditary trait problem
  • Organism with two copies of every gene
  • Expressed and non-expressed traits

Skills Practiced

  • Interpreting information - verify you can read information regarding an example of a homozygous genotype and interpret it correctly
  • Reading comprehension - ensure that you draw the most important information from the related biology lesson
  • Problem solving - use acquired knowledge to solve hereditary trait problems

Additional Learning

To learn more, review the corresponding lesson titled Properties of Alleles, which will help you:

  • Understand what makes an organism homozygous
  • Explain how a homozygous genotype could look
  • Identify when an organism would be heterozygous
  • Describe the difference between heterozygous and homozygous
  • Appreciate how a recessive trait compares to a dominant one