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Pearson Edexcel International GCSE Biology (4BI1)

1 The nature and variety of living organisms

(a) Characteristics of living organisms

(b) Variety of living organisms

2 Structure and functions in living organisms

(a) Level of organisation

(b) Cell structure

(c) Biological molecules

(d) Movement of substances into and out of cells

(f) Respiration

(g) Gas exchange

(j) Co-ordination and response

3 Reproduction and inheritance

(a) Reproduction

(b) Inheritance

3.14 Genome and genes

3.15 Chromosomes and genes

3.16B DNA structure

3.17B RNA structure

3.18B Protein synthesis

3.20 Genetic terminology

3.21B Codominance

3.22 Polygenic inheritance

3.23 Monohybrid inheritance

3.24 Interpreting family pedigrees

3.25 Monohybrid cross probabilities

3.26 Sex chromosomes

3.27 Sex determination at fertilisation

3.28 Mitosis and identical diploid cells

3.29 Roles of mitosis

3.30 Meiosis and haploid gametes

3.31 Random fertilisation and variation

3.32 Human diploid and haploid chromosome numbers

3.33 Variation within a species

3.35B DNA mutations and phenotype

3.36B Effects of genetic mutations

3.38 Darwin’s theory of evolution by natural selection

3.39 Antibiotic resistance

4 Ecology and the environment

(a) The organism in the environment

(b) Feeding relationships

(c) Cycles within ecosystems

(d) Human influences on the environment

5 Use of biological resources

(a) Food production

(b) Selective breeding

(c) Genetic modification (genetic engineering)

6 Experimental skills

(a) Problem-solving and application

(b) Investigation planning and methods

(c) Observations, measurements and variables

(d) Analysis, communication and evaluation

7 Mathematical skills

1 Arithmetic and numerical computation

2 Handling data

5 Geometry and trigonometry

Question Bank/IGCSE Edexcel Biology/3 Reproduction and inheritance/(b) Inheritance/3.21B Codominance

Edexcel IGCSE Biology 3.21B Polygenic inheritance

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