Grade 12 CAPS Genetics – Core Concepts

Detailed slide shows with notes and visuals on the grade 12 CAPS curriculum for the core concepts of genetics and inheritance.

Consists of:

* 103 slide presentation in full colour containing all information required by CAPS ATP (2021 – 2023)

* PDF and PP printer-friendly versions to use for student handouts

Detailed explanation of content:

Concepts of inheritance:

• Chromatin and chromosomes;
• Genes and alleles;
• Dominant and recessive alleles;
• Phenotype and genotype;
• Homozygous and heterozygous;
• Law of Dominance

Monohybrid crosses

• Format for genetics cross, 
• Mendel’s Principle of Segregation 
• Types of dominance: Complete dominance; Incomplete dominance; Co-dominance
• Proportion and ratio of genotypes and phenotypes

• Sex determination:
• Differentiate between sex chromosomes (gonosomes) and autosomes in the karyotypes of human males and females;
• Representation of a genetic cross to show the inheritance of sex
• Sex-linked inheritance:
• Genetics problems involving the following sex-linked disorders:
• Haemophilia
• Colour-blindness

Dihybrid crosses:

• Mendel’s Principle of Independent Assortment
• Dihybrid genetics problems
• Determination of the proportion/ratio of genotypes and phenotypes

Blood grouping:

• Different blood groups are a result of multiple alleles
• The alleles IA, IB and i in different combinations result in four blood groups
• Genetics problems involving the inheritance of blood type