1: Introduction to heredity
- Page ID
- 65133
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- 1.1: Introduction to heredity
- Heredity and Classical Genetics. Dominant and recessive traits. Heterozygous and homozygous genotypes.
- 1.2: Alleles and genes
- A gene as a stretch of DNA on a chromosome. Alleles as versions (sequence variants) of a gene.
- 1.3: Worked example - Punnett squares
- Learn how to use Punnett squares to calculate probabilities of different phenotypes. Includes worked examples of dihybrid crosses, independent assortment, incomplete dominance, codominance, and multiple alleles.
- 1.4: Mendel and his peas
- How Austrian monk Gregor Mendel laid the foundations of genetics. Mendel's life, experiments, and pea plants.
- 1.5: The law of segregation
- Mendel's law of segregation. Genotype, phenotype, and alleles. Heterozygous/homozygous. 2 x 2 Punnett squares.
- 1.6: The law of independent assortment
- Mendel's law of independent assortment. Dihybrid crosses. 4 x 4 Punnett squares.
- 1.7: Probabilities in genetics
- The sum rule and product rule. Applying these rules to solve genetics problems involving many genes.
Thumbnail: Punnett Square. (CC BY-SA 3.0; Pbroks13 via Wikimedia Commons).