From genes to phenotype
From genes to phenotype
A gene is a length of DNA that codes for a polypeptide or functional RNA, and an allele is a version of a gene. Your genotype is the set of alleles you have, while your phenotype is the set of characteristics you can observe.
Step-by-step lessons on Edexcel A A Level Biology Epigenetics, phenotype and continuous variation. Each one builds up to exam-style questions. Build a strong foundation in cell biology and biochemistry early on, since later topics on genetics, ecology and physiology all draw on these core concepts.