At the end of this activity, students should be able to name the main factors influencing variation of traits, differentiate between inherited variation and non-inherited variation, explain the relationship between phenotypic traits, genotype (the genetic record of traits) and the modifying effects of environmental factors, explain the biological significance of variation and explain the reasons for the vast range of possible combinations of traits and the uniqueness of an individual's traits.

Originally released by Learnetic, 2016.