Agricultural Science Grade 12 Genetics Notes PDF Download: 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: