Biology › Section Q · Immunity and reproduction › Topic Q.4
Reproduction methods and fertilization
Animals make the next generation in strikingly different ways: by cloning themselves, by releasing gametes into open water, or by fertilising eggs inside the body. This topic sorts those strategies and the trade-offs behind each one.
In this topic
- Two routes to the next generation
- Asexual methods: fission, budding and fragmentation
- Parthenogenesis: an egg without a father
- Hermaphrodites and sex change
- How sex is determined
- Worked example: a turtle incubation experiment
- External fertilisation
- Internal fertilisation and the organs for it
- Egg-laying, egg-retaining and live-bearing
- Worked example: classifying reproductive strategies
- Common mistakes to avoid
- Key takeaways
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