Genetic Fitness: Selection


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1. Which of the following must be TRUE of a population for selection to occur?

2. How is it possible that a harmful gene can code for an advantageous characteristic?

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About This Quiz & Worksheet

The role of genes in the human body is very complex, and this assessment/worksheet combo will help you see how much you understand about genetic fitness and selection. Some terms you will be quizzed on include genotype, phenotype, and 'survival of the fittest'.

Quiz & Worksheet Goals

In this short exam, you will be tested on the concepts of:

  • Inherited genetic disease
  • Survival of the fittest
  • Harmful gene coding as advantageous to survival
  • Diverse phenotypes in a population

Skills Practiced

The quiz and worksheet allow students to test the following skills:

  • Making connections - use understanding of genetic selection to understand why a specific gene could be harmful to one person but helpful to a different person
  • Critical thinking - apply relevant concepts to examine information about the relationship between natural selection and harmful genes in a different light
  • Defining key concepts - ensure that you can accurately define main terminology, such as genotype and phenotype
  • Information recall - access the knowledge you have gained regarding the role of genes in terms of genetic fitness

Additional Learning

To learn more about the role of genes in organisms, review the accompanying lesson on Selection & Genetic Fitness. This lesson covers the following objectives:

  • Define genotype and phenotype
  • Understand the role of genetic fitness as the ability to successfully pass genes to the next generation and find examples
  • Know that natural selection requires a diverse genetic population
  • Identify an example of how a gene can be advantageous when one copy is passed on but harmful when two copies are inherited