What this topic covers
B5: Genes, inheritance and selection has 2 subtopics:
- B5.1 Inheritance
- B5.2 Natural selection and evolution
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GCSE OCR Higher Biology · Topic 5 of 6
B5: Genes, inheritance and selection – GCSE OCR Higher Biology revision notes
Choose a subtopic. Inheritance, variation, natural selection and evolution. 44 lessons in 2 subtopics.
Revise B5: Genes, inheritance and selection for GCSE OCR Higher Biology, including B5.1 Inheritance and B5.2 Natural selection and evolution.
44
Lessons
2
Subtopics
B5: Genes, inheritance and selection lessons by subtopic
44 lessons, grouped by subtopic.
B5.1 Inheritance
- Chromosomes, DNA and Genes
- Gametes in Sexual Reproduction
- Sexual vs Asexual Reproduction and Cell Division
- What is Meiosis?
- Fertilisation and Development
- Sexual vs Asexual Reproduction: Types and Advantages
- Reproduction Strategies in Nature
- DNA Structure and the Genome
- Applications of Genome Research
- The Structure of DNA
- From DNA Code to Protein Synthesis
- Genetic Variation and Mutations
- Genetic vocabulary and basic inheritance (Part 1/2)
- Genetic vocabulary and basic inheritance (Part 2/2)
- Genetic crosses and Punnett squares
- Multiple gene inheritance
- Understanding Inherited Disorders
- Ethical Issues in Embryo Screening
- Sex Chromosomes and Genetic Crosses
- Causes of Variation
- Mutations and Phenotype Changes
- Mendel's Revolutionary Discovery
- From Chromosomes to Gene Theory
B5.2 Natural selection and evolution
- What is Evolution?
- How Evolution Works Through Natural Selection
- Formation of New Species
- What is Selective Breeding and How Does it Work?
- The Impact and Problems of Selective Breeding
- Darwin's Theory of Natural Selection
- The Publication and Controversy of Evolution
- Comparing Theories of Evolution
- Darwin and Wallace: Developing the Theory of Evolution
- Wallace's Contributions and the Impact on Biology
- The Process of Speciation
- Evidence for Evolution
- Darwin's Theory and Modern Evidence
- What are fossils and how are they formed?
- Fossils as evidence for evolution
- Understanding Extinction and Its Causes
- How Antibiotic Resistance Develops
- Preventing Antibiotic Resistance
- The Three-Domain System
- The Linnaean Classification System
- Evolution of Classification and Evolutionary Trees
More in this course
Go back to the full GCSE OCR Higher Biology topic list, or practise this topic with past-paper questions.
Frequently asked questions
What is B5: Genes, inheritance and selection?
Inheritance, variation, natural selection and evolution. 44 lessons in 2 subtopics.
How many chromosomes do humans have?
Human body cells have 46 chromosomes arranged in 23 pairs. The Chromosomes, DNA and Genes notes cover this in full.
What does DNA stand for?
DNA stands for deoxyribonucleic acid. The The Structure of DNA notes cover this in full.
What is MRSA?
MRSA (methicillin-resistant Staphylococcus aureus) is a strain of Staphylococcus aureus bacteria that has evolved resistance to methicillin and many other commonly used antibiotics. The How Antibiotic Resistance Develops notes cover this in full.
What are genes?
Genes are sections of DNA that control the development of specific characteristics and are passed from parents to offspring. The Darwin's Theory and Modern Evidence notes cover this in full.
What is a gene?
A gene is a specific section of a DNA molecule that codes for a particular characteristic. The Chromosomes, DNA and Genes notes cover this in full.
What is a fossil?
A fossil is the preserved remains or traces of organisms that lived millions of years ago, found in rocks. The What are fossils and how are they formed? notes cover this in full.
What is an allele?
An allele is a different version of the same gene that controls the same characteristic but may produce different traits. The Genetic vocabulary and basic inheritance (Part 1/2) notes cover this in full.
When did the dodo go extinct?
The dodo went extinct in 1681, within 200 years of humans arriving on Mauritius. The Understanding Extinction and Its Causes notes cover this in full.