2. Sources of Genetic Variation

By the end of this section you should be able to:

1. Model how meiosis produces genetically different gametes through segregation and crossing over.

Essential Vocabulary

MeiosisGametes Crossing overHomologous chromosomeSegregation

2. Explain that mutations can change the sequence of genes, or entire chromosomes.

Essential Vocabulary

Gene mutationSubstitutionDeletionInsertionFrameshiftSilent Chromosomal mutationTranslocationDeletionDuplicationNon-disjunction

3. Explain why mutations to DNA in some cells can be passed to offspring, but others will not.

Essential Vocabulary

GametesSomatic cells

4. Explain how mutations during replication (cell cycle) can lead to cancer.

Essential Vocabulary

DNA replicationCell cycleCancer

5. Describe how environmental factors, like UV rays, can lead to mutations.

Essential Vocabulary

UV lightRadiation Chemical exposure

6. Explain why mutations (and genetic variation) can be good for populations.

Essential Vocabulary

Natural selectionGenetic variationAdaptation

The activities below should be used to review essential vocabulary

Use the following quizzes to test your knowledge of essential vocabulary. You need to scroll to see all of the questions and select the "submit" button to complete the quiz and get a score.

LS3-2: Sources of Genetic Variation

This is a Content Quiz. You need to scroll to see all of the questions and select the "submit" button to complete the quiz and get a score.

This is a Skills Quiz to help you review and apply science practices to the content from this module. You need to scroll to see all of the questions and select the "submit" button to complete the quiz and get a score.

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