Tag: inheritance
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Mutations and Evolution in Aquatic Mammals
Students examine a phylogenetic tree that reveals mutations found in aquatic mammals as evidence of convergent evolution.
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How Do Bunny Populations Change Over Time?
A set of images show how rabbits change over time as a result of selective pressure from wolf predation. Students match each graphic with one of the four steps of evolution on the VIDA chart: variation, inheritance, differential survival, and adaptation.
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Case Study: How Do Genes Determine Skin Color?
This case study focuses on a news story whose headline declares that a “mother is a the only black woman to give birth to two white babies.” Students look past the sensationalized headline to discover how skin color is controlled by multiple genes and make a final judgement about whether statements made in the…
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Practice Genetics: Sex Linked Genes
Students learn basic Mendelian genetics by crossing traits from fruit flies and pea plants. In this extension, students can practice doing crosses that involve sex-linked traits, where the alleles are located on the X chromosome which affects the pattern of inheritance. This worksheet is designed for beginning biology students, as it provides in most…
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Are Exit Tickets a Good Way to Assess Understanding?
My genetics unit for Freshman Biology always starts with a history lesson on Mendel and our understanding of heredity at that time. One of the main themes of this lesson is a comparison between two ways of thinking about inheritance and two competing theories: The Particulate Theory and the Blending Theory. Students struggle…