A man builds very large muscles by training in a gym for many years.
Large muscles from training are an acquired characteristic.
State what is meant by an acquired characteristic.
Explain why the man's son will not inherit large muscles from his father's training.
The son does the same training as his father for the same number of years. His muscles do not become as large as his father's muscles.
Suggest two reasons why.
Most characteristics, such as body mass, are affected by both genes and the environment.
Explain how genes and the environment can both affect the body mass of a person.
40 exam-style questions on Edexcel GCSE Biology 3.4 Variation and the Human Genome Project, covering 3.4.1 Causes of variation, 3.4.2 Outcomes of the Human Genome Project, 3.4.3 Genetic variation within a population, and 3.4.4 Effects of genetic mutations on phenotype. Each one has a worked solution and a mark scheme showing where the marks go.