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7th Grade Science
Evolution
2. Mechanisms
2.2 Genetic Variation, Sources of diversity
Genetic Variation: Exploring the Sources of Biological Diversity
Discover how mutations, meiosis, and sexual reproduction generate the genetic differences that drive evolution and help populations survive changing environments.
What You'll Learn
Mutations introduce new alleles randomly into any living population.
Crossing over during meiosis creates new chromosome allele combinations.
Sexual reproduction combines two parents producing genetically unique offspring.
High genetic variation helps populations survive changing environmental conditions.
What You'll Practice
1
Students identify mutations, crossing over, and independent assortment processes.
2
Learners compare genetic diversity in sexual versus asexual reproduction types.
3
Questions test understanding of alleles, genotype, phenotype, and gametes.
Why This Matters
Understanding the sources of genetic variation is essential because it explains how populations adapt, survive environmental change, and drive the process of evolution itself.
This Unit Includes
1 Video lesson
Practice exercises
Learning resources
Skills
Genetic Variation
Mutations
Meiosis
Crossing Over
Natural Selection
MO Curriculum Aligned