Reproduction and Inheritance · 7 question types
Past paper frequency (2018 to 2024)
This topic accounts for approximately 11% of your exam marks.
Sexual vs asexual reproduction comparisons appear frequently; IVF and cloning as application questions.
Puberty is the period during adolescence when the body changes from a child into an adult capable of reproducing. The changes are triggered by sex hormones released by the reproductive organs:
The changes are called secondary sexual characteristics to distinguish them from the primary sexual characteristics (the reproductive organs themselves, which were present from birth).
Triggered by rising testosterone:
Triggered by rising oestrogen:
Some changes happen in everyone during puberty: