Application of Mendel's First Law


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question 1 of 3

Two animals heterozygous at gene A are mated. What ratio of genotypes will be produced in the offspring?

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1. Sarah has blonde hair even though both of her parents have brown hair. In old photos she has seen that both her parents' mothers had blonde hair before it went white. Given this information what can you suggest about the dominance of the different hair color genes?

2. A scientist is studying an animal which can be found with either black or white fur. Which of following could be FALSE in this study?

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About This Quiz & Worksheet

In this quiz, it is assumed you've already learned the theory of Mendel's First Law. Here, you will be applying it to examples.

Quiz & Worksheet Goals

This quiz is about the application of Mendel's First Law and will test how well you understand:

  • Genotypic ratios
  • Dominant phenotypes in monohybrid crosses
  • Interpreting genotypes of animals given specific traits

Skills Practiced

  • Reading comprehension - draw the most important information from the lesson on applying Mendel's First Law
  • Critical thinking - use this information to consider what could be true about an animal's genetics
  • Problem solving - figure out percentages of dominant phenotypes

Additional Learning

There can be a lot to process about this topic. So, we recommend you read or re-read the lesson on the Application of Mendel's First Law, which covers the following objectives:

  • Define the law of segregation
  • Know how generations in genetic crosses were named
  • Define Punnett square
  • Define monohybrid cross
  • Understand how to predict the outcome of a monohybrid cross
  • Interpret the results of a Punnett square