Biology O Level 5090 Notes Online

Thread-like structures in nucleus (humans: 23 pairs)

Producer → primary consumer → secondary consumer → tertiary consumer Example: Grass → rabbit → fox biology o level 5090 notes

– Always expressed if present Recessive allele (t) – Only expressed if two copies present Tt) Phenotype – Physical appearance (e.g.

– Genetic makeup (e.g., Tt) Phenotype – Physical appearance (e.g., tall) biology o level 5090 notes