Biology 27

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Population Genetics

Topic (27) Use math about biodiversity as influenced by size of population. (HS-LS2-2)

Population genetics seeks to understand how and why the frequencies of alleles and genotypes change over time within and between populations. It is the branch of biology that provides the deepest and clearest understanding of how evolutionary change occurs.

Population genetics is particularly relevant today in the expanding quest to understand the basis for genetic variation in susceptibility to complex diseases.

Population types and population size can be influenced by:

  • biotic factors (factors due to living things)
  • abiotic factors (factors due to non-living things)

For this topic, students should focus on biotic factors. How can diversity of living things within an area influence the size (or, number) of particular organisms living there?


Day 1 – Introduction
Day 2 – Virtual Textbook

2:44 Population Genetics

3:51 Population Limiting Factors | Biology

8:31 Hardy-Weinberg Punnett Square

Instructor Resources

Standard Daily Material
  • Day 1 – Standard material – introduction day
  • Day 2 – Standard material – reading day
  • Day 3 – Standard material – make a presentation
  • Day 4 – Standard material – give a presentation
  • Extra! – Enrichment and remediation options
Other Topic Specific Resources

Special Notes and Notices

Instructor Emphasis:

  • Science & Engineering Practice: Use mathematical and computational thinking.
  • Cross-Cutting Concept: Stability and Change.

Emphasize HS-LS2-2 Use mathematical representations to support and revise explanations based on evidence about factors affecting biodiversity and populations in ecosystems in different scales.

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