This 31-slide powerpoint presentation covers 'Topic 3.3 - Meiosis' in the 2016 IB Biology curriculum. Each slide includes the specific learning objective as well as key vocabulary that students should note.
The topic has been divided into three sections:
• A - Meiosis Intro
• B - Stages of Meiosis
• C - Genetic Variation & Non-disjunctions
The presentation itself contains minimal information as it is intended to be used with teacher guidance. There are sometimes 'Video' throughout which link to relevant and informative YouTube content. The slides are formatted to be visually pleasing and to also print well for handouts or revision. Please see the preview file (first 8 slides) for an idea of the aesthetic and level of detail in the presentation. The relevant 'Essential Knowledge' can be found below.
I have had success using these presentations to review topics after students have been exposed to the material at home. I typically have the class read relevant material (book, site, etc.) and then watch the videos the day before introducing a topic. During the class period, I use the slides to structure the discussion around the IB Bio Understandings. The remaining class time is spent reinforcing the knowledge or working on activities, written test practice, or nature of science.
**These presentations are based on the IB Biology Course Guide and do not follow any textbook
As always, please let me know if you have any suggestions for improvements. These are always a work in progress!
U1: One diploid nucleus divides by meiosis to produce four haploid nuclei.
U2: The halving of the chromosome number allows a sexual life cycle with fusion of gametes.
U3: DNA is replicated before meiosis so that all chromosomes consist of two sister chromatids.
U4: The early stages of meiosis involve pairing of homologous chromosomes and crossing over followed by condensation.
U5: Orientation of pairs of homologous chromosomes prior to separation is random.
U6: Separation of pairs of homologous chromosomes in the first division of meiosis halves the chromosome number.
U7: Crossing over and random orientation promotes genetic variation.
U8: Fusion of gametes from different parents promotes genetic variation.
A1: Non-disjunction can cause Down syndrome and other chromosome abnormalities.
A2: Studies showing age of parents influences chances of nondisjunction.
A3: Description of methods used to obtain cells for karyotype analysis e.g. chorionic villus sampling and amniocentesis and the associated risks.
S1: Drawing diagrams to show the stages of meiosis resulting in the formation of four haploid cells.
Dokimi IB Biology Products
IB Biology SL PPT Bundle
Topic 1 - Cell Biology PPT Bundle
• 1.1 - Intro to Cells PPT
• 1.2 - Ultrastructures of Cells PPT
• 1.3 - Membrane Structure PPT
• 1.4 - Membrane Transport PPT
• 1.5 - Origin of Cells PPT
• 1.6 - Cell Division PPT
Topic 2 - Molecular Biology PPT Bundle
• 2.1 - Molecules to Metabolism PPT
• 2.2 - Water PPT
• 2.3 - Carbohydrates & Lipids PPT
• 2.4 - Proteins PPT
• 2.5 - Enzymes PPT
• 2.6 - Structure of DNA & RNA PPT
• 2.7 - DNA Replication, Transcription & Translation PPT
• 2.8 - Cell Respiration PPT
• 2.9 - Photosynthesis PPT
Topic 3 - Genetics PPT Bundle
• 3.1 - Genes PPT
• 3.2 - Chromosomes PPT
• 3.3 - Meiosis PPT
• 3.4 - Inheritance PPT
• 3.5 - Genetic Modification & Biotechnology PPT
Topic 4 - Ecology PPT Bundle
• 4.1 - Species, Communities & Ecosystems PPT
• 4.2 - Energy Flow PPT
• 4.3 - Carbon Cycling PPT
• 4.4 - Climate Change PPT
Topic 5 - Evolution & Biodiversity PPT Bundle
• 5.1 - Evidence for Evolution PPT
• 5.2 - Natural Selection PPT
• 5.3 - Classification of Biodiversity PPT
• 5.4 - Cladistics PPT
Topic 6 - Human Physiology PPT Bundle
• 6.1 - Digestion & Absorption PPT
• 6.2 - The Blood System PPT
• 6.3 - Defense Against Infectious Disease PPT
• 6.4 - Gas Exchange PPT
• 6.5 - Neurons & Synapses PPT
• 6.6 - Hormones, Homeostasis & Reproduction PPT
Topic 7 - Nucleic Acids
• 7.1 - DNA Structure & Replication PPT