Sexual vs Asexual Reproduction Explained
Learn the key differences between sexual and asexual reproduction, including gametes, cell division, genetic variation, clones and clear AQA GCSE examples.
Sexual reproduction involves the joining of male and female gametes, whereas asexual reproduction involves one parent and no fusion of gametes. Sexual reproduction produces genetically different offspring, while asexual reproduction produces genetically identical offspring called clones.
Key differences
| Sexual reproduction | Asexual reproduction |
|---|---|
| Male and female gametes join during fertilisation | No gametes join |
| Genetic information is mixed | There is no mixing of genetic information |
| Meiosis produces the gametes | Only mitosis is involved |
| Offspring are genetically different | Offspring are genetically identical clones |
| Usually slower and requires more energy | Usually faster and more energy-efficient |
A gamete is a reproductive cell, such as a sperm or egg cell. Fertilisation is the fusion of male and female gametes.
Why does sexual reproduction produce variation?
Gametes are formed by meiosis and are genetically different. When male and female gametes fuse, genetic information from both is combined. This creates genetic variation between offspring.
Variation can be useful if the environment changes. Some individuals may have characteristics that help them survive and reproduce.
Why can asexual reproduction be useful?
Asexual reproduction requires only one parent, so an organism does not need to find a mate. It is usually quicker and can produce many offspring when conditions are favourable.
For example, strawberry plants can reproduce asexually using runners. The new plants are clones of the parent plant. However, a lack of genetic variation means that a disease or environmental change could affect all the clones similarly.
Common exam mistake
Do not say that asexual reproduction involves no cell division. It involves mitosis, which produces genetically identical cells. Sexual reproduction uses meiosis to form gametes, followed by fertilisation.
This answer uses AQA GCSE Biology 8461 separate-science scope. The main differences are common to both Foundation and Higher tiers.
