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Causes of variation

Causes of variation

One genotype producing different phenotypes when environmental conditions differ

Variation means differences in the characteristics of individuals belonging to the same species. Genetic variation is caused by differences in inherited alleles, while environmental variation is caused by conditions experienced during life.

3.4 Variation and the Human Genome Project Lesson

  1. GCSE
  2. /Biology
  3. /3.4 Variation and the Human Genome Project

Step-by-step lessons 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 builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.

Lessons