SHS3 General Science · Semester 2 Week 16: The Human Body and Health

Lesson notes

Learning Objectives

Indicator: 3.4.1.LI.2 - Explore selected traits in humans using applications of Mendelian crossing.

By the end of the lesson, learners can:

Define a Mendelian cross and identify the components of a Punnett square (parental genotypes, gametes, offspring genotypes, and phenotypes).
Use letters of the alphabet to represent alleles for selected human traits (height, skin colour, baldness) and set up monohybrid crosses correctly.
Determine the genotypic and phenotypic ratios from a given Mendelian cross for a selected human trait.
Predict the probability of offspring inheriting a particular trait from parents with known genotypes.
Design a mind map linking the concepts studied in Weeks 11 to 15 (heredity, hereditary diseases, sex determination) to the selected traits explored in this lesson.

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Curriculum details

Strand: Relationships with the Environment (Strand 4)
Sub-strand: The Human Body and Health (4.1)
Content standard: 3.4.1.CS.2 - Explore and model sex determination in humans 3.4.1.LO.2 Design mind maps and concept maps of some Mendelian crossing to sex determination in humans.
Indicator: 3.4.1.LI.2 - Explore selected traits in humans using applications of Mendelian crossing.
Suggested placement: Semester 2, Week 16 (Week 36 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: NaCCA curriculum document, p. 113

Exemplars (from the NaCCA curriculum)

Talk for Learning: In mixed-ability groups, learners select genes represented by letters of the alphabet and use them to draw Mendelian crossings for the following traits: height, skin colour, baldness, etc.
Teaching and Learning Resources:
- Wall charts
- Books
- Pictures and videos on Mendelian crossing.
Assessment (3.4.1.AS.2). The document marks these depth-of-knowledge levels for this indicator: Level 3 Strategic reasoning.