Edexcel International GCSE (9–1) Human Biology 4HB1 · 11.23
Random fertilisation and variation (repeated)
- Code
- 11.23
- In
- 11 Reproduction and heredity
- Course
- International GCSE (9–1) Human Biology 4HB1
- Board
- Edexcel
Grade boundaries·Edexcel command words
Codes and titles are read by a script from Edexcel's published specification and have not been checked by a person. What each point covers is in the specification itself: Edexcel’s specification.
Points in 11 Reproduction and heredity
- 11.1 Fertilisation
- 11.2 Development of the embryo from a zygote
- 11.3 Meiosis and variation
- 11.4 Male and female reproductive systems
- 11.5 Hormones in the menstrual cycle
- 11.6 Progesterone, placenta, amniotic fluid and umbilical cord
- 11.7 Hormones and secondary sexual characteristics
- 11.8 Birth and breast feeding
- 11.9 Human growth and development
- 11.10 Methods of contraception
- 11.11 Advantages and disadvantages of contraceptive methods
- 11.12 IVF
- 11.13 Alleles
- 11.14 Genetic terms
- 11.15 Sex chromosomes
- 11.16 Sex determination
- 11.17 Random fertilisation and variation
- 11.18 Multiple alleles and ABO blood groups
- 11.19 Monohybrid inheritance
- 11.20 Family pedigrees
- 11.21 Inherited conditions
- 11.22 Gene therapy for cystic fibrosis
- 11.23 Random fertilisation and variation (repeated)
- 11.24 Genetic and environmental variation