Year 10 Science: DNA

Over the past few weeks, the Year 10s have been learning about Deoxyribonucleic Acid (DNA). After studying the history about DNA and its involvement with Genetic material, students were asked to present a timeline of events leading into the discovery of DNA, with reference to historic scientists Oswald Avery, Rosalind Franklin, Maurice Wilkins, Erwin Chargaff, James Watson and Francis Crick. Students then explored the structure of the DNA molecule, including the sugar-phosphate back bone and four chemical bases: A (Adenine), T (Thymine), C (Cytosine) and G (Guanine). Students extracted some DNA out of a Split Pea cell and then created their own ‘lolly’ models of DNA. Next, the students will explore the relationship between DNA and Genes, including genotypes and phenotypes and how we inherit characteristics from our parents.