Explain genetic and environmental causes of phenotypic variation.

Assessment focus 177: Explain genetic and environmental causes of phenotypic variation.. For Evolution may lead to speciation, this objective focuses specifically on explain genetic and environmental causes of phenotypic variation.. Subtopic anchor: Evolution may lead to speciation. Use named evidence, diagrams, calculations or experimental observations when the question provides them, and link each observation to a biological conclusion. A strong answer distinguishes this objective from related ideas in Evolution may lead to speciation by naming the process, evidence and outcome separately. Use the exact assessment boundary "Explain genetic and environmental causes of phenotypic variation." when deciding what evidence belongs in the answer. Synoptic links may involve other A-Level Biology topics, but the answer should return to Genetics and ecosystems official content and the exact wording of this objective. Exam-ready responses define the relevant term, apply it to the named context, use genetic, environmental, causes, phenotypic, variation accurately, and finish with the biological consequence or interpretation required by the question.