Biology › Inheritance and population genetics

Inheritance and population genetics

Unit B16 · 4 lessons.

Notes

Illustrated notes for each topic in this unit, with worked examples and a checklist of objectives.

• Meiosis and the sources of genetic variation
  The two divisions of meiosis, homologous pairing and bivalents, crossing over at chiasmata, independent assortment and the 2 to the power n…
• Monohybrid inheritance and genetic diagrams
  Genotype and phenotype, dominant and recessive alleles, the line-by-line layout of a genetic diagram, monohybrid ratios, test crosses, codominance…
• Dihybrid inheritance, linkage, epistasis and the chi-squared test
  Dihybrid crosses and the 9:3:3:1 ratio, the dihybrid test cross, autosomal linkage and recombination frequency, epistasis with the 9:3:4, 12:3:1 and…
• Population genetics and Hardy-Weinberg equilibrium
  Gene pools and allele frequencies, the Hardy-Weinberg principle and its five conditions, the equations p plus q equals one and p squared plus two pq…