CAIE IGCSE Biology 16.2.1 Defining Sexual Reproduction
Practise describing sexual reproduction through gamete nuclear fusion, zygote formation and genetically different offspring.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- state that sexual reproduction involves fusion of the nuclei of two gametes
- identify the product of nuclear fusion as a zygote
- link meiosis and random fertilisation to genetically different offspring
16.2.1—Sexual reproduction as a process question 1
A scientist investigated sexual reproduction in flowering plants.
Fig. 2.1 shows the procedure for crossing two plants of the same species.
The scientist collected the seeds and germinated them. The leaves and flowers of the offspring plants showed phenotypic variation as they were not all identical to the parent plants.
The scientist then investigated the chromosomes of all the offspring plants and found that they had exactly the same number of chromosomes as the parent plants.
Explain how sexual reproduction results in the variation that the scientist discovered in the offspring plants.
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