Biology: O Level 5090 Notes

Introduction to Biology Definition: Biology is the study of living organisms and their interactions with the environment.

– Always expressed if present Recessive allele (t) – Only expressed if two copies present biology o level 5090 notes

– Genetic makeup (e.g., Tt) Phenotype – Physical appearance (e.g., tall) Introduction to Biology Definition: Biology is the study

Thread-like structures in nucleus (humans: 23 pairs) Tt) Phenotype – Physical appearance (e.g.