From alleles to genotype frequencies
From alleles to genotype frequencies

A species is a group that can interbreed to produce fertile offspring, and a population is members of that species living together in one place and time. The gene pool is the total collection of alleles in that population.
Step-by-step lessons on Edexcel A A Level Biology Hardy-Weinberg, isolation and speciation. 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.