#7.2.1
Species exist as one or more populations.
#7.2.2
A population as a group of organisms of the same species occupying a particular space at a particular time that can potentially interbreed.
#7.2.3
The concepts of gene pool and allele frequency.
#7.2.4
The Hardy–Weinberg principle provides a mathematical model, which predicts that allele frequencies will not change from generation to generation. The conditions under which the principle applies.
#7.2.5
The frequency of alleles, genotypes and phenotypes in a population can be calculated using the Hardy–Weinberg equation:
\(p^2+2pq + q^2=1\)
where \(p\) is the frequency of one (usually the dominant) allele and \(q\) is the frequency of the other (usually recessive) allele of the gene.