This 27-slide powerpoint presentation covers 'Topic 3.2 - Chromosomes' in the 2016 IB Biology curriculum. Each slide includes the specific learning objective as well as key vocabulary that students should note.
The unit is divided into two sections:
• A - Pro & Eukaryotic Chromosomes
• B - Karyograms
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: Prokaryotes have one chromosome consisting of a circular DNA molecule.
U2: Some prokaryotes also have plasmids but eukaryotes do not.
U3: Eukaryote chromosomes are linear DNA molecules associated with histone proteins.
U4: In a eukaryote species there are different chromosomes that carry different genes.
U5: Homologous chromosomes carry the same sequence of genes but not necessarily the same alleles of those genes.
U6: Diploid nuclei have pairs of homologous chromosomes.
U7: Haploid nuclei have one chromosome of each pair.
U8: The number of chromosomes is a characteristic feature of members of a species.
U9: A karyogram shows the chromosomes of an organism in homologous pairs of decreasing length.
U10: Sex is determined by sex chromosomes and autosomes are chromosomes that do not determine sex.
A1: Cairns’ technique for measuring the length of DNA molecules by autoradiography.
A2: Comparison of genome size in T2 phage, Escherichia coli, Drosophila melanogaster, Homo sapiens and Paris japonica.
A3: Comparison of diploid chromosome numbers of Homo sapiens, Pan troglodytes, Canis familiaris, Oryza sativa, Parascaris equorum.
A4: Use of karyograms to deduce sex and diagnose Down syndrome in humans.
S1: Use of databases to identify the locus of a human gene and its polypeptide product.
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