This lesson describes the biological meaning of species, populations, gene pool and allele frequency and explains how these terms are linked. The PowerPoint and accompanying resources are part of the 1st lesson in a series of 2 lessons that cover the detail of specification point 7.2 (Populations) of the AQA A-level biology.
The two living species of the African elephant, the forest and bush elephant, are used as examples to demonstrate the meaning of species and to show how they exist as one or more populations. A quick quiz introduces the term gene pool in an engaging way and then the allele frequency of three versions of the GBA gene demonstrates how these frequencies can change in small populations. In doing so, students are briefly introduced to genetic drift which they will encounter in an upcoming topic.
The students are challenged throughout the lesson with understanding checks and prior knowledge checks as well as exam-based questions where they have to comment on the validity of a scientist’s conclusion.
The other lesson in topic 7.2 is the Hardy-Weinberg principle.
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AQA A-level Biology Topic 7: Genetics, populations, evolution and ecosystems
This bundle contains 17 fully-resourced and detailed lessons that have been designed to cover the content of topic 7 of the AQA A-level Biology specification which concerns genetics, populations, evolution and ecosystems. The wide range of activities included in each lesson will engage the students whilst the detailed content is covered and the understanding and previous knowledge checks allow them to assess their progress on the current topic as well as challenging them to make links to other related topics. Most of the tasks are differentiated to allow differing abilities to access the work and be challenged. The following sub-topics are covered in this bundle of lessons: * The use of genetic terminology * The inheritance of one or two genes in monohybrid and dihybrid crosses * Codominant and multiple alleles * The inheritance of sex-linked characteristics * Autosomal linkage * Epistasis as a gene interaction * The use of the chi-squared test * Species exist as one or more populations * The concepts of gene pool and allele frequency * Calculating allele frequencies using the Hardy-Weinberg principle * Causes of phenotypic variation * Stabilising, directional and disruptive selection * Genetic drift * Allopatric and sympatric speciation * Species, populations, communities and ecosystems * Factors affecting the populations in ecosystems * Estimating the size of a population using randomly placed quadrats, transects and the mark-release-recapture method * Primary succession, from colonisation by pioneer species to climax community * Conservation of habitats frequently involves the management of succession This is one of the 8 topics which have to be covered over the length of the 2 year course and therefore it is expected that the teaching time for this bundle will be in excess of 2 months If you want to see the quality of the lessons before purchasing then the lessons on codominant and multiple alleles, epistasis and phenotypic variation are free resources to download
£26.00
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Populations (Topic 7.2 AQA A-level biology)
Both of the lessons in this bundle are fully-resourced and have been planned to contain a variety of tasks which cover the following content in the populations topic (7.2) of the AQA A-level biology specification: * Species exist as one or more populations * The concepts of gene pool and allele frequency * Application of the Hardy-Weinberg equation Both lessons contain understanding checks to allow students to assess their knowledge of the current topic as well as prior knowledge checks to encourage them to make links to content from earlier in topic 7 and from topics 1 - 6.
£3.75
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