Chapter 13 / 12 short lessons
Reproduction
Connect cell division to reproduction, then follow gametes in flowers and humans from formation to fertilisation.
G3 Pure Biology / K325 / 2027 syllabus
What do you think?
Human body cells usually have 46 chromosomes. Why does a zygote not normally have 92?
Lessons
0 of 12 marked as readMitosis makes matching cells
Explain asexual reproduction and the role of mitosis in growth, repair and reproduction.
About 5 minGametes and chromosome sets
Define sexual reproduction and explain chromosome sets before and after fertilisation.
About 5 minMeiosis halves the chromosome number
Explain the reduction in chromosome number and the role of meiosis in gamete formation.
About 5 minFlower parts and their functions
Identify an insect-pollinated flower and connect its structures to their functions.
About 5 minPollination: moving pollen to a stigma
Define pollination and distinguish self-pollination from cross-pollination.
About 4 minHow flowers are adapted for pollination
Use flower and pollen features to explain adaptation to insect or wind pollination.
About 5 minFertilisation in flowering plants
Trace pollen-tube growth into an ovule and distinguish it from fertilisation.
About 4 minTrace the male reproductive system
Identify the named male structures and explain their functions.
About 4 minTrace the female reproductive system
Identify the named female structures and distinguish their functions.
About 4 minThe menstrual cycle
Explain menstruation, ovulation, hormone effects and variation in cycle timing.
About 5 minFertilisation, implantation and the placenta
Explain early cell division, implantation, amniotic protection and placental exchange.
About 6 minExplain HIV transmission accurately
Explain HIV transmission and match each route with an effective reduction method.
About 5 minWhat you will be able to do
- Distinguish mitosis, meiosis and fertilisation.
- Explain flower structures, pollination and pollen-tube growth.
- Trace human reproductive structures and early development.
- Explain menstrual changes, fetal exchange and HIV transmission.
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