Mendel's Dihybrid Cross Example: Practice & Ratio


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question 1 of 3

You have the following alleles: B=blue, b=green, H=two-horned and h=one-horned:

Which of the following crosses most likely produced the following results?

54 blue, two-horned lizards

18 blue, one-horned lizards

18 green, two-horned lizards

6 green, one-horned lizards

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1. How would you define a dihybrid cross?

2. A Punnett square is useful when determining phenotypic output, for all of the following reasons EXCEPT:

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About This Quiz & Worksheet

These resources will help you see how much you know about Mendel's Second Law, using examples of how it can be applied. You'll need to solve practice problems to pass the quiz.

Quiz & Worksheet Goals

This quiz tests you on the following about Mendel's Second Law:

  • The cross most likely to produce a given result
  • Possible genotypic frequencies of a given cross

Skills Practiced

  • Reading comprehension - draw the most relevant information from the lesson on Mendel's Second Law
  • Critical thinking - use this information to consider possible genetic crosses
  • Information recall - access the knowledge you have gained about Mendel's Second Law

Additional Learning

If you wish to learn more on this subject, the lesson titled Mendel's Second Law: The Law of Independent Assortment covers the following objectives:

  • Know how to predict genotypes and phenotypes
  • Understand how to predict phenotypic ratios