Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 3.19 - Understand how genes exist in alternative forms called alleles which give rise to differences in inherited characteristics. Specification Point 3.20 - Understand the meaning of the terms: dominant, recessive, homozygous, heterozygous, phenotype, and genotype. Specification Point 3.21B - Understand the meaning of the term codominance. Complete set of Chapter 5 Lessons are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 3.35B - Understand how a change in DNA can affect the phenotype by altering the sequence of amino acids in a protein. Specification Point 3.36B - Understand how most genetic mutations have no effect on the phenotype, some have a small effect and rarely do they have a significant effect. Specification Point 3.37B - Understand that the incidence of mutations can be increased by exposure to ionising radiation (for example, gamma rays, x-rays and ultraviolet rays) and some chemical mutagens (for example, chemicals in tobacco). Complete set of Chapter 5 Lessons are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 3.22 - Understand that most phenotypic features are the result of polygenic inheritance rather than single genes. Specification Point 3.23 - Describe patterns of monohybrid inheritance using a genetic diagram. Specification Point 3.24 - Understand how to interpret family pedigrees. Specification Point 3.25 - Predict probabilities of outcomes from monohybrid crosses. Specification Point 3.26 - Understand how the sex of a person is controlled by one pair of chromosomes, XX in a female and XY in a male. Specification Point 3.27 - Describe the determination of the sex of offspring at fertilisation, using a genetic diagram. Complete set of Chapter 5 Lessons are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 3.31 - Understand how random fertilization produces genetic variation of offspring. Specification Point 3.32 - Know that in human cells the diploid number of chromosomes is 46 and the haploid number is 23. Specification Point 3.33 - Understand that variation within a species can be genetic, environmental, or a combination of both. Specification Point 3.34 - Understand that mutation is a rare, random change in genetic material that can be inherited. Complete set of Chapter 5 Lessons are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 4.1 - Understand the terms population, community, habitat and ecosystem. Specification Point 4.2 - Practical: investigate the population size of an organism in two different areas using quadrats. Complete set of Chapter 6 Lessons are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 40 - Pregnancy and Puberty. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 3.11 - Describe the role of the placenta in the nutrition of the developing embryo. Specification Point 3.12 - Understand how the developing embryo is protected by amniotic fluid. Specification Point 3.13 - Understand the roles of oestrogen and testosterone in the development of secondary sexual characteristics. Complete set of Chapter 5 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 3.1 - Understand the differences between sexual and asexual reproduction. Specification Point 3.2 - Understand that fertilisation involves the fusion of a male and female gamete to produce a zygote that undergoes cell division and develops into an embryo. Complete set of Chapter 5 Lessons are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 36 - Reproduction. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 3.1 - Understand the differences between sexual and asexual reproduction. Specification Point 3.2 - Understand that fertilisation involves the fusion of a male and female gamete to produce a zygote that undergoes cell division and develops into an embryo. Complete set of Chapter 5 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 35 - More Hormones. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.95B - Understand the sources, roles and effects of the following hormones: ADH, FSH and LH. Complete set of Chapter 4 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 3.3 - Describe the structures of an insect-pollinated and a wind-pollinated flower and explain how each is adapted for pollination. Specification Point 3.4 - Understand that the growth of the pollen tube followed by fertilisation leads to seed and fruit formation. Specification Point 3.5 - Practical: investigate the conditions needed for seed germination. Specification Point 3.6 - Understand how germinating seeds utilise food reserves until the seedling can carry out photosynthesis. Specification Point 3.7 - Understand that plants can reproduce asexually by natural methods (illustrated by runners) and by artificial methods (illustrated by cuttings). Complete set of Chapter 5 Lessons are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 39 - FSH and LH. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 3.10B - Understand the roles of FSH and LH in the menstrual cycle. Complete set of Chapter 5 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 3.10B - Understand the roles of FSH and LH in the menstrual cycle. Complete set of Chapter 5 Lessons are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.1 - Understand the role of erosional and depositional processes in the development of landforms: headlands and bays, cliffs, wavecut platforms, caves, arches, stacks and stumps, beaches, spits and bars. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.1 - Understand the influence of geology, vegetation, people and sea-level changes on coastal environments. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.2 - Understand the distributions and features of the world’s coastal ecosystems (coral reefs, mangroves, sand dunes and salt marshes). Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 1.3 - Understand the causes of river flooding, including rainfall intensity, seasonal variations in discharge due to monsoons or snowmelt, relief, urbanisation, and the prediction and prevention of flooding. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 1.3 - Understand the uses of water, including agriculture, industry, human hygiene and leisure, and the rising demand for and supply of water. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.3 - Understand the conflicts between different users of the coast, with different views on coastal management (conservation or development). Complete set of Chapter 2 Lectures are available.

Complete set of concise, modern presentations for AQA A Level Psychology (7181 and 7182) Chapter 1 - Social Influence. Contains colour coded specification points. Four presentations included: 1 - Conformity 2 - Conformity to Social Roles 3 - Obedience 4 - Resistance and Minority Influence