Chapter 7 · Biology
How do Organisms Reproduce?
Reproduction ranges from a single Amoeba splitting in two to double fertilisation in a flower. The module lets you step through each mode and label the real structures on code-drawn diagrams.
Reproduction Lab
Step through asexual and sexual reproduction strategies, and explore the human menstrual cycle.
Step 1 / 4
- Organism
- Amoeba
- Offspring after
- 4 generation(s)
- Count
- 16
Formula sheet
Binary fission
1 parent → 2 identical daughters
Amoeba, Leishmania (longitudinal), Plasmodium (multiple fission).
Population doubling
N = N₀ × 2ⁿ
n = number of fission cycles; shows how fast asexual reproduction multiplies numbers.
Fertilisation
Male gamete (n) + Female gamete (n) → Zygote (2n)
Restores the diploid chromosome number.
Menstrual cycle
≈ 28 days; ovulation around day 14
Uterine lining is shed if fertilisation does not occur.