Agricultural Science Grade 12 Genetics notes pdf: Genetics section of Agricultural Science Grade 12 is normally included in paper 2 of the matric exam.

Agricultural Science Grade 12 Genetics Notes

Key Terminologies you should know for the exam:

In Basic Genetics it is very important to know the genetics terms in order to be able to do most of the questions. The following is a list of terms and their definitions in Basic Genetics:

  • Allele – variations of the same gene
  • Atavism – reappearance of a characteristic in an organism after a period of absence
  • Biometrics – the use of statistics in biology
  • Biotechnology – the use of organisms to produce useful substances
  • Breeding – process of producing plants or animals by sexual reproduction
  • Cloning – a research activity that creates a copy of some biological entity (a gene/cell/organism)
  • Dihybrid cross – a genetic cross that involves 2 pairs of contrasting characteristics
  • Dominant – an allele that masks the effect of another & is expressed in the appearance of an individual
    • Co-dominance – type of inheritance where both alleles are dominant and fully expressed in the phenotype
    • Incomplete dominance – type of inheritance where both alleles are partially expressed, often producing an intermediate characteristic.
  • Epistasis – masking of the phenotypic effect of alleles at one gene by alleles of another gene
  • Gametes – a reproductive cell having a haploid number of chromosomes
  • Gene – unit of heredity that carries information for each characteristic of an organism
  • Genetics – study of inheritance/ genes
  • Genotype -genetic makeup of an organism

Downloadable pdf note:

Watch: Monohybrid Cross. Grade 12 Agricultural Sciences. Basic Agricultural Genetics

Monohybrid Cross. Grade 12 Agricultural Sciences. Basic Agricultural Genetics

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