Tall or Short
Tall or Short explores the relationship between genetics, heredity, and cell division using plant height as a model trait. The content aligns with Year 10 Biological Sciences in the Australian Curriculum V9 (AC9S10U01).
Download Presentation Slides (PowerPoint file) >
There are two core activities and one extension activity as part of this lesson:
Activity 1: Dice Game
This activity simulates the random inheritance of alleles and compares experimental results with Punnett square predictions. Students roll allele-labelled dice to generate offspring genotypes (TT, Tt, tt) and observe probability in action.
Access dice handout >
Activity 2: Visualising Meiosis
Students use coloured pipe cleaners to represent maternal and paternal chromosomes to model how meiosis turns one cell into four sex cells, each with half the number of chromosomes.
Access Meiosis pipe cleaner activity instructions >
Extension Activity: Design Your Own Plant
Apply understanding of dominant and recessive alleles by designing a breeding strategy that guarantees offspring inherit a chosen trait. Students select genotypes, create Punnett squares, and justify their breeding decisions. Instructions for this activity are within the slides.