Sexual reproduction combines gametes and creates genetic variation, while asexual reproduction produces genetically identical offspring from one parent by cloning or mitotic division.
Coverage 2014–2017 · Updated 16 Jul 2026
Asexual reproduction uses one parent without gamete fusion and normally produces genetically identical offspring; sexual reproduction uses meiosis and fertilization to produce new allele combinations.
| Mode | Relative advantage | Relative limitation |
|---|---|---|
| Asexual | Rapidly preserves a successful genotype when a parent is already adapted to a stable environment | Little new genetic variation makes a changed environment risky for many offspring |
| Sexual | Variation among offspring increases the chance that some are suited to changed conditions | Requires production and fusion of gametes and does not preserve one genotype exactly |
A strawberry runner produces a clone suited to the parent's current habitat, whereas a seed formed after fertilization carries a new allele combination.
Asexual offspring can still differ after mutation or environmental effects; 'clone' refers to their inherited genome, not guaranteed identical phenotype.
This objective is assessed through structured response, commonly using Identify / Outline / Describe.
Identify / Outline / Describe
Build the answer around this relationship: A clone is genetically identical to the single parent or source cell that produced it.
Representative question
Outline natural methods of cloning in some eukaryotes.
Core D3.1 route: reproduction creates offspring, gametes or pollen move, fertilization or germination follows, and the consequence is variation, embryo formation, seed production, or successful early growth.
Core D3.1 exam questions usually combine reproduction strategy with gamete formation, fertilization, human cycles, IVF, plant pollination, or seed germination. Treat each answer as a route: name the process, say what moves or changes, then give the biological consequence.
