Genetics & Animal Breeding is one of 9 topics in the Grade 12 Agricultural Sciences CAPS syllabus, covered across 3 lessons on Study Vault. Below are real practice questions from this topic with full worked answers.
Sample practice questions
Easy
1. An animal with two identical alleles for a gene (e.g. BB or bb) is described as:
Homozygous for that gene
Heterozygous for that gene
Phenotypically recessive regardless of the alleles
Genetically unstable
Answer: Homozygous for that gene — An animal with two identical alleles (BB or bb) is homozygous; one with two different alleles (Bb) is heterozygous.
Easy
2. The observable physical characteristic of an animal (e.g. its coat colour) is called its:
Phenotype
Genotype
Allele
Chromosome
Answer: Phenotype — The phenotype is the observable physical characteristic, resulting from the genotype and, for many traits, environmental factors.
Easy
3. Name the term for an animal's actual genetic makeup, e.g. the combination of alleles "Bb".
Answer: genotype — Genotype refers to an animal's actual combination of alleles (e.g. Bb), as distinct from its observable phenotype.
