What is the Hardy-Weinberg equation?
The Hardy-Weinberg equation is: p2+2pq+q2=1
It is important to remember that p+q also equals 1.
p2 is the frequency of the homozygous dominant genotype, and q2 the recessive. 2pq is the frequency of the heterozygous genotype.
p and q are the allele frequencies of the dominant and recessive allele respectively.
Exam questions will give you one frequency (either an allele or geno/phenotype frequency) and using this you will have to work out the other values that go into the equation in order to provide the answer that the particular question is looking for.
MC
Related Biology A Level answers
All answers ▸What is the difference between the Parasympathetic Nervous System and the Sympathetic Nervous System?
What enzymes are used in the process of DNA replication and what are they used for?
How can natural selection and isolation lead to speciation?
How are action potentials propagated across cholinergic synapses?