Dominant Trait: Definition & Example

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question 1 of 3

A dominant allele ______.

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1. If allele 'A' is dominant to allele 'a', then for which genotype would the dominant trait be expressed?

2. Having two different alleles for a gene is called ______.

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About This Quiz & Worksheet

What are terms used to describe genes and traits passed down from our parents? You will need to know what these terms mean in order to successfully answer the questions contained in this quiz/worksheet combo.

Quiz & Worksheet Goals

In these assessments you'll be tested on:

  • What a dominant allele does
  • The way in which a dominant trait would be expressed in a given example
  • The term used to describe a gene that has two different alleles
  • Which genotype leads to a dominant trait
  • The ability to recognize a true statement or statements about a dominant trait

Skills Practiced

This worksheet and quiz will allow you to test the following skills:

  • Critical thinking - apply relevant concepts to examine information about heredity in a different light
  • Defining key concepts - ensure that you can accurately define main terms, such as genotype and recessive
  • Distinguishing differences - compare and contrast homozygous and heterozygous genotypes
  • Information recall - access the knowledge you've gained regarding examples of dominant traits in human, animals and plants

Additional Learning

To learn more about this topic, review the accompanying lesson called Dominant Trait: Definition, Example & Quiz. This lesson covers the following objectives:

  • Define gene
  • Explain what alleles are and identify the two types of alleles
  • Describe the different combinations of alleles that can be present in a gene
  • Use the example of earlobe formation in humans to illustrate dominant and recessive traits
  • List examples of other dominant traits in humans and other organisms
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