Inheritance, Variation and Evolution

1 Sexual and Asexual Reproduction Compare sexual and asexual reproduction and explain the role of meiosis in sexual reproduction. Spec 4.6.1 2 DNA and the Genome Describe the structure of DNA, what genes are, and what the human genome project achieved. Spec 4.6.2 3 Genetic Inheritance Explain dominant and recessive inheritance and use Punnett squares to predict offspring ratios. Spec 4.6.3 4 Inherited Disorders Describe cystic fibrosis and polydactyly as examples of inherited genetic disorders. Spec 4.6.3.2 5 Sex Determination Explain how biological sex is determined by the X and Y chromosomes. Spec 4.6.3.3 6 Variation Describe the causes of variation and distinguish between genetic, environmental and combination variation. Spec 4.6.4 7 Evolution and Natural Selection Describe Darwin's theory of evolution by natural selection and explain how populations change over time. Spec 4.6.5 8 Selective Breeding Describe how selective breeding works and its applications and disadvantages. Spec 4.6.6 9 Genetic Engineering Describe genetic engineering — how it works, examples and ethical considerations. Spec 4.6.7 10 Evidence for Evolution Describe the main types of evidence that support the theory of evolution. Spec 4.6.5 11 Fossils and Extinction Describe how fossils form and explain why species become extinct. Spec 4.6.5 12 Resistant Bacteria Explain how antibiotic resistance develops through natural selection and why it is a global health threat. Spec 4.6.5